The fruux Insider’s Guide
Everything we know about fruux 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.
fruux
The Insider’s Guide
CalDAV and CardDAV sync for contacts, calendars and tasks
Every plan, grade, refund rule and rival among calendar and scheduling apps, read from fruux’s own pages.
Made by fruux GmbH · checked Nov 12, 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 fruux’s own pages, its app-store listings and our grades. Every fact in it is on fruux’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.8
GPA, above 55 of the 89 other calendar and scheduling apps we grade
fruux is a hosted service that stores contacts, calendars and tasks and syncs them to the devices and apps you already use through the open CardDAV and CalDAV standards. It also has a web app, shared calendars, public calendar links and team accounts. A free Basic plan allows two devices and two shares.
To get you started, here are 9 things to know about fruux, taken from its own pages and our grades.
You set up accounts on each device through its own sync settings.
- 1
Best for syncing calendars and contacts over CalDAV
fruux syncs contacts, calendars and tasks across devices through CalDAV and CardDAV, with a free plan and Pro at €4 a month.
- 2
Paid plans start at about $3.72 a month
As its pricing page puts it: €4 per month or €40 per year (Pro).
- 3
There is a free plan
Basic plan: unlimited contacts, calendars, tasks and storage, up to 2 shares and up to 2 devices.
- 4
It runs on 6 platforms
Web, macOS, Windows, Linux, iOS and Android.
- 5
Standards-based sync
Syncs through CardDAV and CalDAV, so apps such as Apple's built-in ones, Thunderbird, BusyCal, Fantastical and eM Client can connect without a fruux app.
- 6
Contacts, calendars and tasks
All three data types are kept together, with search, multiple task lists and filtering, calendar views and a web app.
- 7
Sharing and public calendars
Share calendars and address books with other people, or publish a public calendar as a link or embed on a website.
- 8
A 2.8 GPA, above 55 of 89
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 fruux you could make: calendar and tasks. What surrounds it you could not. The 3 things listed below take a company, not a weekend.
fruux at a glance
- Pricing
- Free plan, from €4 per month or €40 per year (Pro)
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web, macOS, Windows, Linux, iOS, Android
- Made by
- fruux GmbH
- Category
- Calendar & Scheduling
- Our grade
- 2.8 GPA, good
The report card
Best for syncing calendars and contacts over CalDAV
fruux syncs contacts, calendars and tasks across devices through CalDAV and CardDAV, with a free plan and Pro at €4 a month. It publishes no apps of its own and relies on each device's built-in clients, the free plan stops at 2 devices and 2 shares, and prices are in euros only.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | Pro is €4 a month or €40 a year, under the category's $4.99 cheapest quarter. Team is €20 a month for 5 members. |
| Free plan and trial | B | Basic is free with unlimited contacts, calendars, tasks and storage, limited to 2 devices and 2 shares. |
| Features | C | It does one job, sync, and does it fully, which is a smaller job than a calendar app. Free-busy, out-of-office and delegation need a compatible client because the web app does not support them yet. |
| Ease of use | C | No store rating on record. You set up accounts on each device through its own sync settings. |
| Platforms and integrations | A | Web, Mac, Windows, Linux, iOS and Android through standard clients, plus Thunderbird, Fantastical, BusyCal and Outlook, and a developer API. |
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 fruux is for
- Fits if you want calendars and contacts in sync across phone and laptop
- Works for small teams that need shared address books
Who it is not for
- Tight if you stay free: Basic stops at 2 devices and 2 shares
- Not for you if you want a calendar app, since fruux publishes no native apps in what we read
- Watch out: free-busy, out-of-office and delegation need a compatible calendar app
- Watch out: prices are in euros, with no US dollar price
Good to know
Good for
- People who want one sync account for several calendar and contact apps
- Small teams sharing address books and calendars
- Developers who want a standards-based calendar sync API
Worth knowing
- Free accounts stop at 2 devices and 2 shares; Pro raises these to 10 devices and unlimited shares.
- Prices are in euros, and there is no US dollar price.
- Free-busy, out-of-office and delegation features need a compatible calendar application, because the web app does not support them yet.
- fruux does not publish its own native apps in what we read; it relies on the devices' own CalDAV and CardDAV clients.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
~$3.72
A month to start. There is a free plan too
fruux has a free plan. Paid plans start at €4 per month or €40 per year (Pro).
Basic
€0
Just for you: up to 2 shares and up to 2 devices, with unlimited contacts, calendars and tasks.
Pro
€4
per month, or €40 per year
All Basic features with unlimited shares and up to 10 devices.
Team
€20
per month for 5 team members, plus €4 per extra
Pro features for every member, easy team management, team address books and shared scheduling; extra members are €4 a month.
The free plan
Basic plan: unlimited contacts, calendars, tasks and storage, up to 2 shares and up to 2 devices.
Read from fruux.com on Nov 12, 2026.
Ways to pay less
Annual discount
Pro is cheaper billed yearly
fruux's pricing page lists Pro at €4 a month or €40 a year, which is two months free against paying monthly.
Stated on fruux.com
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
6
Places it runs: Web, macOS, Windows, Linux, iOS and Android
CalDAV and CardDAV sync for contacts, calendars and tasks. Here is what it does, as its own site describes it, and what it covers: public API, tasks, calendar.
It does one job, sync, and does it fully, which is a smaller job than a calendar app.
- Standards-based sync
- Syncs through CardDAV and CalDAV, so apps such as Apple's built-in ones, Thunderbird, BusyCal, Fantastical and eM Client can connect without a fruux app.
- Contacts, calendars and tasks
- All three data types are kept together, with search, multiple task lists and filtering, calendar views and a web app.
- Sharing and public calendars
- Share calendars and address books with other people, or publish a public calendar as a link or embed on a website.
- Team accounts
- Create a team for a company or department, invite members, assign roles and control who can see which contacts, calendars and tasks.
- Free-busy scheduling
- Free-busy lookups show who is available when planning a meeting, and delegation lets an assistant manage your schedule. These need a compatible calendar app, not the web app.
- Developer API
- The API is built on CardDAV, CalDAV, vCard and iCalendar and covers what the web app can do. fruux also maintains the open-source sabre/dav server.
Where it runs
- Web
- macOS
- Windows
- Linux
- iOS
- Android
What it works with
- Thunderbird
- BusyCal
- Fantastical
- eM Client
- Rainlendar
- Microsoft Outlook
fruux is made by fruux GmbH.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
55/89
Other calendar and scheduling apps it is graded above
fruux's GPA of 2.8 is higher than 55 of the 89 other calendar and scheduling apps we grade, and level with 15.
It stands best on platforms and integrations (A, above 85 of 89) and worst on ease of use (C, above 1).
Its paid plans start at about $3.72 a month, against a middle price of $6.99 for the category: 15 of the 66 others that charge start lower.
On features, ease of use and platforms it scores 2.7 out of 4. 6 tools score higher and cost less.
Each grade against the category
Every bar is all 90 calendar and scheduling apps we grade, cut by the letter each got. fruux’s own letter is outlined.
- BValue for moneyAbove 49 of 89
- BFree plan and trialAbove 49 of 89
- CFeaturesAbove 4 of 89
- CEase of useAbove 1 of 89
- APlatforms and integrationsAbove 85 of 89
Price against what you get
Each dot is one of 81 calendar and scheduling apps. Further left costs less; higher up scores better on features, ease of use and platforms. fruux 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 fruux you could make: calendar and tasks. What surrounds it you could not. The 3 things listed below take a company, not a weekend.
It costs $44.69 a year.
What you could make
- Calendar and tasks: an app builder makes these well.
What you could not
- Apps for macOS, Windows, Linux, iOS and Android that stay in step with each other.
- It plugs into other products, Thunderbird, BusyCal and Fantastical among them, and has an API.
- Sharing with other people, which means accounts and invitations.
What this rests on. fruux’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
Proton Calendar, Tuta Calendar, Zoho Calendar, Apple Calendar and BusyCal
The 5 tools fruux is most often weighed against, with where each one differs from it.
- 2.6GPA
Proton Calendar
Free plan · from $3.99/mo
End-to-end encrypted calendar from the maker of Proton Mail.
- Proton Calendar is open source and end-to-end encrypted, according to its own site.
- fruux also covers tasks.
- Proton Calendar also covers booking links.
- 2.4GPA
Tuta Calendar
Free plan · from €3/mo
End-to-end encrypted calendar bundled with Tuta Mail.
- Tuta Calendar is open source and end-to-end encrypted, according to its own site.
- fruux also covers tasks.
- 3.0GPA
Zoho Calendar
Free plan · from $1/mo
Free online calendar for teams, part of Zoho Mail and Workplace.
- Only fruux lists macOS, Windows and Linux apps.
- fruux also covers tasks.
- Zoho Calendar also covers natural-language input and booking links.
- 3.2GPA
Apple Calendar
Free
Free built-in calendar for iPhone, iPad, Mac and iCloud.com.
- Only fruux lists Windows, Linux and Android apps.
- Apple Calendar also covers natural-language input.
- 2.4GPA
BusyCal
Free plan · from $49.99 one-time
Customizable calendar and task app for Mac and iPhone.
- Only fruux lists a web app.
- Only fruux lists Windows, Linux and Android apps.
- BusyCal can be bought with a one-time purchase.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
12
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 fruux free?
fruux has a free plan. Basic plan: unlimited contacts, calendars, tasks and storage, up to 2 shares and up to 2 devices.
How much does fruux cost?
fruux lists 3 plans. Basic: €0.
What platforms does fruux work on?
fruux is available on Web, macOS, Windows, Linux, iOS and Android.
Does fruux offer any discounts?
fruux publicly lists the following: Pro is cheaper billed yearly.
Is fruux open source?
fruux is not described as open source on its own site, as read on Nov 12, 2026.
Does fruux have an API?
Yes. fruux offers a public API, according to its own site.
What does fruux integrate with?
fruux's listing names Thunderbird, BusyCal, Fantastical, eM Client, Rainlendar and Microsoft Outlook.
Who makes fruux?
fruux is made by fruux GmbH.
What are the alternatives to fruux?
The closest alternatives to fruux in our directory are Proton Calendar, Tuta Calendar, Zoho Calendar, Apple Calendar and BusyCal.
How does fruux compare with other calendar and scheduling apps?
fruux's GPA of 2.8 is higher than 55 of the 89 other calendar and scheduling apps we grade, and level with 15.
Is fruux good value for money?
ToolGPA grades fruux B for value for money. Its paid plans start at about $3.72 a month, against a middle price of $6.99 for the category: 15 of the 66 others that charge start lower.
Could I make my own version of fruux?
The plain part of fruux you could make: calendar and tasks. What surrounds it you could not.
Where this guide comes from
The prices, plans, platforms and features were read from fruux’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from fruux's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
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 fruux GmbH. Prices change, so check fruux.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 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.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- fruux, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/fruux
- 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, "fruux: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/fruux
Know someone choosing between calendar and scheduling apps?
Send them this guide: toolgpa.com/tools/fruux/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded calendar and scheduling apps after fruux, each with an Insider's Guide of its own.
- Calendar & Scheduling Insider's GuideEvery one of the 90 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 fruux’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. fruux is a trademark of its owner, and this guide is not made, paid for or approved by fruux GmbH. Prices and plans change: check fruux.com before you buy.