The OneCal Insider’s Guide
Everything we know about OneCal in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
OneCal
The Insider’s Guide
Calendar sync, booking links and a unified calendar view
Every plan, grade, refund rule and rival among calendar and scheduling apps, read from OneCal’s own pages.
Made by OneCal SHPK · checked Oct 9, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from OneCal’s own pages, its app-store listings and our grades. Every fact in it is on OneCal’s page too, where it is kept up to date. Checked Oct 9, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.4
GPA, above 18 of the 74 other calendar and scheduling apps we grade
OneCal keeps Google Calendar, Outlook, iCloud and CalDAV calendars in step by copying events between them in real time, so a meeting on one calendar blocks the same time on the others. The same subscription includes one-on-one and collective booking links, a unified view for managing every connected calendar, and an AI assistant. There is no free plan: every account starts with a 14-day trial and then needs one of three per-user plans.
To get you started, here are 9 things to know about OneCal, taken from its own pages and our grades.
No rating on record, and setting up means connecting accounts and building sync rules in the web app.
- 1
Best for stopping double bookings across several calendars
OneCal copies events between Google, Outlook, iCloud and CalDAV calendars in real time, so busy on one means busy on all, with booking links and a combined view in the same price.
- 2
Paid plans start at $5 a month for each person
As its pricing page puts it: $5 per user / month, billed annually ($6 billed monthly).
- 3
You can try it first
14-day free trial on every plan, no credit card required
- 4
It runs on 4 platforms
Web, macOS, iOS and Android.
- 5
Real-time calendar sync
Copies events between Google Calendar, Outlook, iCloud and CalDAV calendars, one-way or multi-way, so each calendar shows the time as taken. Every plan allows unlimited sync configurations.
- 6
Privacy controls for synced events
Choose which details are copied, such as titles, descriptions, participants, locations and meeting links. Clones can be marked private, and events can be excluded by color or category.
- 7
Scheduling links
Unlimited one-on-one and collective booking links with buffers, minimum notice, custom questions, manual confirmation, workflows and embedding. Availability is read from all connected calendars.
- 8
A 2.4 GPA, above 18 of 74
That is against the other calendar and scheduling apps we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
The plain part of OneCal you could make: calendar. What surrounds it you could not. The 7 things listed below take a company, not a weekend.
OneCal at a glance
- Pricing
- Free trial, from $5 per user / month, billed annually ($6 billed monthly)
- Free plan
- No
- Free trial
- 14-day free trial on every plan, no credit card required
- Runs on
- Web, macOS, iOS, Android
- Made by
- OneCal SHPK
- Category
- Calendar & Scheduling
- Our grade
- 2.4 GPA, fair
The report card
Best for stopping double bookings across several calendars
OneCal copies events between Google, Outlook, iCloud and CalDAV calendars in real time, so busy on one means busy on all, with booking links and a combined view in the same price. There's no free plan: after 14 days your syncs pause, cloned events are removed and booking links go dark. Starter covers 2 calendars at $5 a user billed annually, and setup can't be done from the phone apps.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | Starter is $5 a user a month billed annually, $6 monthly, which is the middle band of this category. What you're really buying is calendars: 2 on Starter, 5 on Essential at $10, 50 on Premium at $25. Hold five clients' calendars and the bill doubles. |
| Free plan and trial | C | No free plan, but the 14-day trial on every plan needs no card. When it ends, syncs pause, the cloned events are removed and booking links go dark until you buy a plan. |
| Features | B | Both halves of the job: one-way or multi-way sync with control over which details get copied, unlimited one-on-one and collective booking links with workflows, one view to create and edit events on every calendar, and an AI assistant that changes nothing until you confirm. |
| Ease of use | C | No rating on record, and setting up means connecting accounts and building sync rules in the web app. The phone apps won't help: there, syncs are view-only and booking links can't be made or edited. |
| Platforms and integrations | B | Web, iPhone and Android with Zoom, Teams, Meet, Zapier and an MCP server for Claude or ChatGPT. The Mac app is really the iPad app, which the App Store limits to Macs with an M1 chip or later. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who OneCal is for
- Fits if your work and personal calendars keep landing you in two places at once
- Works for consultants and freelancers holding calendars from several clients
Who it is not for
- Skip it if you want something free, because syncs and booking links stop when the 14-day trial ends
- Pricey if you need more than 5 calendars, which means Premium at $25 a user a month billed annually
- Not for you if you want to set things up from your phone, as syncs and booking links are managed on the web
- Watch out: removing OneCal branding from booking pages and dedicated support need Premium
- Watch out: the Mac app is the iPad app, limited to Macs with an M1 chip or later, and several admin features are on request
Good to know
Good for
- People whose work and personal calendars keep producing double bookings
- Consultants and freelancers holding calendars from several clients
- Teams that want calendar sync and booking links in one subscription
Worth knowing
- There is no free plan. When the 14-day trial ends, syncs are paused, cloned events are removed and booking links are disabled until a plan is bought.
- Starter connects 2 calendars per user and Essential 5. Removing OneCal branding from booking pages and dedicated support need Premium.
- In the mobile apps, calendar syncs are view-only and booking links cannot be created or edited; that setup is done in the web app.
- The macOS app on the plan table is the iPhone and iPad app, which the App Store marks as designed for iPad and limits to Macs with an M1 chip or later.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$5
A month to start, for each person
OneCal is a paid product with a free trial, starting at $5 per user / month, billed annually ($6 billed monthly).
Hold five clients' calendars and the bill doubles.
Starter
$5
per user / month, billed annually ($60)
Up to 2 connected calendars per user, with unlimited calendar syncs and booking links. $6 per user when billed monthly.
Essential
$10
per user / month, billed annually ($120)
Up to 5 connected calendars per user, with the same sync, booking and calendar features. $12 per user when billed monthly.
Premium
$25
per user / month, billed annually ($300)
Up to 50 connected calendars per user, removal of OneCal branding, dedicated support and onboarding help. $30 billed monthly.
Trying it first
14-day free trial on every plan, no credit card required
Read from onecal.io on Oct 9, 2026.
Ways to pay less
Annual discount
2 months free with annual billing
The pricing FAQ and billing docs say yearly billing gives 2 months free: $60, $120 or $300 per user a year against $6, $12 or $30 a month. The page's toggle labels this 20% off.
Stated on onecal.ioNonprofit
Discount for nonprofits and open-source groups
The pricing FAQ says OneCal provides a discount to non-profit and open-source organizations. It does not state the amount.
Stated on onecal.io
What the app costs elsewhere
Each country’s App Store price for “Essential Monthly”, against $12.99 in the United States, in dollars at the day’s rate. The four cheapest and the four dearest of 11.
| Country | Price there | In dollars | Against the US |
|---|---|---|---|
| Canada | $17.99 | $12.65 | about the same |
| Philippines | ₱ 799.00 | $12.72 | about the same |
| Indonesia | Rp 229ribu | $12.81 | about the same |
| India | ₹ 1,299 | $13.43 | about the same |
| Brazil | R$ 79,90 | $15.96 | 23% more |
| Mexico | $299.00 | $16.43 | 26% more |
| Germany | 14,99 € | $16.80 | 29% more |
| United Kingdom | £12.99 | $17.17 | 32% more |
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
4
Places it runs: Web, macOS, iOS and Android
Calendar sync, booking links and a unified calendar view. Here is what it does, as its own site describes it, and what it covers: AI features, calendar, booking links.
Web, iPhone and Android with Zoom, Teams, Meet, Zapier and an MCP server for Claude or ChatGPT.
- Real-time calendar sync
- Copies events between Google Calendar, Outlook, iCloud and CalDAV calendars, one-way or multi-way, so each calendar shows the time as taken. Every plan allows unlimited sync configurations.
- Privacy controls for synced events
- Choose which details are copied, such as titles, descriptions, participants, locations and meeting links. Clones can be marked private, and events can be excluded by color or category.
- Scheduling links
- Unlimited one-on-one and collective booking links with buffers, minimum notice, custom questions, manual confirmation, workflows and embedding. Availability is read from all connected calendars.
- Unified calendar view
- One interface for every connected calendar: create, edit and delete events, RSVP to invites, join calls, hide the clones made by sync and see when teammates are free.
- AI Assistant and MCP server
- A built-in chat answers questions about your schedule and proposes changes to events, syncs and booking links, each applied only after you confirm. An MCP server connects Claude, ChatGPT or other MCP clients.
- Team administration
- The plan table lists OIDC/SAML SSO, SCIM directory sync, audit logs, admin-managed accounts and a user provisioning API on every tier. The docs say several of these are enabled on request.
Where it runs
- Web
- macOS
- iOS
- Android
What it works with
- Google Calendar
- Outlook
- iCloud Calendar
- Zoom
- Microsoft Teams
- Google Meet
- Zapier
OneCal is made by OneCal SHPK.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
18/74
Other calendar and scheduling apps it is graded above
OneCal's GPA of 2.4 is higher than 18 of the 74 other calendar and scheduling apps we grade, and level with 11.
It stands best on features (B, above 47 of 74) and worst on ease of use (C, above 0).
Its paid plans start at $5 a month for each person, against a middle price of $6 for the category: 22 of the 52 others that charge start lower.
On features, ease of use and platforms it scores 2.7 out of 4. 10 tools score higher and cost less.
Each grade against the category
Every bar is all 75 calendar and scheduling apps we grade, cut by the letter each got. OneCal’s own letter is outlined.
- CValue for moneyAbove 10 of 74
- CFree plan and trialAbove 3 of 74
- BFeaturesAbove 47 of 74
- CEase of useAbove 0 of 74
- BPlatforms and integrationsAbove 25 of 74
Price against what you get
Each dot is one of 67 calendar and scheduling apps. Further left costs less; higher up scores better on features, ease of use and platforms. OneCal is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
The plain part of OneCal you could make: calendar. What surrounds it you could not. The 7 things listed below take a company, not a weekend.
That makes this kind of software worth paying for, not this one in particular: 45 of the 74 other calendar and scheduling apps grade higher. It costs $60 a year.
What you could make
- Calendar: an app builder makes this well.
What you could not
- Booking pages that read and write other people's calendars and send the emails.
- Apps for macOS, iOS and Android that stay in step with each other.
- It is priced for each person, which means accounts and billing for a team.
- It plugs into other products, Google Calendar, Outlook and iCloud Calendar among them.
- AI features, unless you pay a model provider for each request yourself.
- What a company asks for before it lets staff use something: single sign-on, SCIM and audit logs.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. OneCal’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
CalendarBridge, Reclaim.ai, Calendly, Morgen and Cal.com
The 5 tools OneCal is most often weighed against, with where each one differs from it.
- 2.2GPA
CalendarBridge
Free trial · from $4/mo
Real-time sync between Google, Outlook and iCloud calendars.
- Only OneCal lists a macOS app.
- CalendarBridge also covers AI agents.
- 2.0GPA
Reclaim.ai
Free plan · from $10/mo
AI scheduling layer for Google Calendar and Outlook.
- Reclaim.ai has a free plan. OneCal does not, though it has a free trial.
- Only OneCal lists macOS, iOS and Android apps.
- Reclaim.ai also covers tasks, time blocking, auto-scheduling and habit tracking.
- 2.8GPA
Calendly
Free plan · from $10/mo
Booking links and team scheduling for external meetings.
- Calendly has a free plan. OneCal does not, though it has a free trial.
- Only OneCal lists a macOS app.
- Only Calendly lists a browser extension.
- 2.4GPA
Morgen
Free trial · from $15/mo
Calendar and daily planner with AI-suggested time blocking.
- Only Morgen lists Windows and Linux apps.
- Morgen also covers tasks, time blocking and auto-scheduling.
- 3.0GPA
Cal.com
Free plan · from $12/mo
Scheduling platform with a free plan, API and embeds.
- Cal.com has a free plan. OneCal does not, though it has a free trial.
- Only Cal.com lists Windows and Linux apps.
- Only Cal.com lists a browser extension.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
13
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is OneCal free?
No, OneCal is a paid product, but you can try it first. 14-day free trial on every plan, no credit card required.
How much does OneCal cost?
OneCal lists 3 plans. Starter: $5 per user / month, billed annually ($60).
What platforms does OneCal work on?
OneCal is available on Web, macOS, iOS and Android.
Does OneCal offer any discounts?
OneCal publicly lists the following: 2 months free with annual billing; Discount for nonprofits and open-source groups.
Does OneCal have a Windows app?
No Windows app was listed when its pages were read on Oct 9, 2026. OneCal is listed for Web, macOS, iOS and Android.
Does OneCal have a Linux app?
No Linux app was listed when its pages were read on Oct 9, 2026. OneCal is listed for Web, macOS, iOS and Android.
Is OneCal open source?
OneCal is not described as open source on its own site, as read on Oct 9, 2026.
What does OneCal integrate with?
OneCal's listing names Google Calendar, Outlook, iCloud Calendar, Zoom, Microsoft Teams, Google Meet and Zapier.
Who makes OneCal?
OneCal is made by OneCal SHPK.
What are the alternatives to OneCal?
The closest alternatives to OneCal in our directory are CalendarBridge, Reclaim.ai, Calendly, Morgen and Cal.com.
How does OneCal compare with other calendar and scheduling apps?
OneCal's GPA of 2.4 is higher than 18 of the 74 other calendar and scheduling apps we grade, and level with 11.
Is OneCal good value for money?
ToolGPA grades OneCal C for value for money. Its paid plans start at $5 a month for each person, against a middle price of $6 for the category: 22 of the 52 others that charge start lower.
Could I make my own version of OneCal?
The plain part of OneCal you could make: calendar. What surrounds it you could not.
Where this guide comes from
The prices, plans, platforms and features were read from OneCal’s own pages on Oct 9, 2026, and the grades were given on Oct 10, 2026. Graded from this listing, whose facts were read from OneCal's own pages on 9 October 2026. Also tested with a demo account on 2026-07-28.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by OneCal SHPK. Prices change, so check onecal.io before you buy.
- onecal.io/pricing
- onecal.io/
- onecal.io/integrations
- onecal.io/mobile-apps
- onecal.io/billing-and-charges
- onecal.io/tos
- onecal.io/blog/best-calendar-apps-for-mac
- docs.onecal.io/docs/billing/plans-and-free-trial
- docs.onecal.io/docs/billing/mobile-subscriptions
- docs.onecal.io/docs/mobile-apps
- docs.onecal.io/docs/ai-assistant
- docs.onecal.io/docs/calendars/connect-caldav-calendar
- docs.onecal.io/docs/integrations/api-keys
- apps.apple.com/us/app/onecal-unified-calendar/id6759604806
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- OneCal, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/onecal
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "OneCal: The Insider's Guide", checked Oct 9, 2026. https://toolgpa.com/tools/onecal
Know someone choosing between calendar and scheduling apps?
Send them this guide: toolgpa.com/tools/onecal/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded calendar and scheduling apps after OneCal, each with an Insider's Guide of its own.
- Calendar & Scheduling Insider's GuideEvery one of the 75 calendar and scheduling apps we grade, compared
- Notion Calendar Insider's GuideFree calendar app that connects to Notion databases3.6 GPA
- Google Calendar Insider's GuideOnline calendar from Google, free with a personal account3.4 GPA
- World Time Buddy Insider's GuideVisual time zone converter and world clock for planning calls3.4 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what OneCal’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. OneCal is a trademark of its owner, and this guide is not made, paid for or approved by OneCal SHPK. Prices and plans change: check onecal.io before you buy.