CalendarBridge vs Howie
We give CalendarBridge a 3.2 GPA and Howie a 2.8, out of 4.0. CalendarBridge grades higher on features and platforms. They get the same grade on value for money, the free plan and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
CalendarBridge
Real-time sync between Google, Outlook and iCloud calendars
Howie
AI assistant that schedules meetings over email and text
How we grade them
| 3.2GPACalendarBridgeVery good | 2.8GPAHowieGood | |
|---|---|---|
| Value for money | BBasic is $4 a month billed yearly ($48), with 2 sync connections and 10 scheduling pages. Cheap, but that's one pair of calendars synced both ways. Three calendars need 6 connections, which means Premium at $8, about typical for this category. | B$25 a month buys 1,250 credits shared by the whole workspace, with unlimited teammates. Next to per-seat tools that's fair for a team. But the pricing section doesn't say how many credits a meeting uses, so you can't work out a real month up front. |
| Free plan and trial | CThe pricing pages list no free plan. You get a 7-day trial with no credit card required, and then it's a paid plan or nothing. | CNo free plan. You start with $25 in free credits, the same sum as a month of the smallest pool, and after that you pay. The listing doesn't say whether you need a card to get them. |
| Features | ASyncing is the job and it's done fully: every detail, just a busy block or something between, with events excluded by colour or category. Plans add booking pages, one calendar view for all accounts and, from Premium, an AI assistant you CC on email. | BIt arranges meetings by email and text, chases people who go quiet, makes booking links, and holds focus time, buffers and travel time. Solid. But the mail and calendar logos on its site are Gmail and Google Calendar, with no Outlook. |
| Ease of use | BWe have no App Store rating on record, so a B is the ceiling. You do have to count connections before you pick a plan: each direction between two calendars is one, which takes a minute to get your head round. | BThere's no app to learn: add Howie to an email thread, or message it by iMessage or SMS, and it gets on with it. We have no App Store rating on record to show how people get on with it, so it stops at a B. |
| Platforms and integrations | AWeb, iPhone and Android, across Google Calendar, Microsoft 365, Outlook and iCloud, with Zoom, Meet, Teams and Stripe. An MCP server lets Claude, ChatGPT or Cursor manage events and syncs. iCloud syncs every 5 to 10 minutes, not in real time. | BYou reach it by email, iMessage and SMS, and it ties into Gmail, Google Calendar, Zoom, Granola, Notion, Todoist and Linear. No phone or desktop app is listed, and a web service with integrations is a B. |
| Best for | keeping work and personal calendars in step | handing meeting back-and-forth to an AI over email |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: CalendarBridge and Howie. How we grade
Where they differ
- CalendarBridge starts at $4 per user / month, billed yearly ($5 billed monthly). Howie starts at $25 per month for 1,250 shared workspace credits.
- Only CalendarBridge lists iOS and Android apps.
- CalendarBridge also covers calendar.
- Howie also covers time blocking.
At a glance
| CalendarBridge | Howie | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $4 per user / month, billed yearly ($5 billed monthly) | $25 per month for 1,250 shared workspace credits |
| Free plan | None | None |
| Free trial | 7-day free trial, no credit card required | $25 in free credits to get started |
| Web | ||
| iOS | ||
| Android | ||
| Made by | CalendarBridge Inc | 3030 Labs, Inc. |
| Price read from | calendarbridge.com | howie.com |
| Checked | Oct 9, 2026 | Oct 6, 2026 |
Who each one suits
CalendarBridge
- People who need work, personal and client calendars to block each other
- Organizations syncing calendars across Microsoft 365 and Google tenants
- Consultants and fractional executives working inside several client accounts
Howie
- Founders and executives who arrange many meetings over email
- People who would like to message an assistant by iMessage or SMS
- Teams that want one shared credit pool with unlimited teammates
Worth knowing
CalendarBridge
- The pricing pages list no free plan, and the trial lasts 7 days.
- The AI Scheduling Assistant is not part of Basic, and a custom email domain for the assistant needs Pro.
- Basic allows 2 sync connections, enough for one pair of calendars synced both ways; three calendars synced to each other need 6.
- Real-time syncing is stated for Google and Outlook events; the help center says syncing from iCloud or .ics calendars runs every 5 to 10 minutes.
Howie
- Pricing is by shared credits, from $25 a month for 1,250; the pricing section does not say how many credits a meeting uses.
- An assistant email address at your own domain costs an extra $20 a month.
- The mail and calendar integrations shown on the site are Gmail and Google Calendar; Outlook is not among the logos.
- Howie is used through email, iMessage and SMS; no mobile or desktop app is listed.
Key features
CalendarBridge
- Real-time calendar syncing
- When an event is created or changed on one calendar, a matching event is created or updated on the others. The pricing page says Google and Outlook events typically update in under a minute.
- Control over what is copied
- Sync every detail, only a busy block, or something in between. Events can be excluded by color or category, and copies can carry an identifier or a color that shows their source.
- Scheduling pages
- Every plan includes up to 10 booking pages that check availability across connected calendars, with buffers, daily limits and minimum notice. Stripe can be connected to take payment at booking.
- Unified calendar
- View and edit events from all connected calendars in one place on the web, iPhone and Android. The number of calendars shown at once is 4, 12 or 24 depending on the plan.
- AI Scheduling Assistant
- On Premium and Pro, you CC or forward an email thread to the assistant; it proposes times from your availability, follows rules written in plain English and books the meeting.
- Group licensing and MCP server
- Group accounts put 2 or more users on one bill and can mix user licenses with admin-managed sync licenses. An MCP server lets agents such as Claude, ChatGPT or Cursor manage events and syncs.
Howie
- Scheduling over email and text
- Add Howie to a thread and it reads the conversation, checks availability, offers times, handles the replies and creates the calendar event.
- Group threads and follow-ups
- It finds a time across group threads and follows up when people go quiet, using a rule you set such as two nudges 48 hours apart.
- Booking links
- Besides negotiating by message, Howie can create booking links for different kinds of meetings.
- Calendar protection
- Finds blocks for deep work or errands, adds holds, buffers, commutes and travel time, and watches for conflicts and overloaded days.
- Reminders and daily briefings
- Manages reminders, to-dos and follow-ups, briefs you on the day ahead and tracks who you are waiting on.
- Assistant with your own identity
- The assistant can have a name and signature you choose. An email address at your company's domain is a paid add-on.
Plans
CalendarBridge
Basic$4
per user / month, billed yearly ($48)
2 sync connections, 10 scheduling pages and the unified calendar for up to 4 calendars. No AI assistant. $5 billed monthly.
Premium$8
per user / month, billed yearly ($96)
20 sync connections, the AI Scheduling Assistant, a 12-calendar unified view and a HIPAA BAA. $10 billed monthly.
Pro$32
per user / month, billed yearly ($384)
56 sync connections, a 24-calendar unified view and a custom email domain for the AI assistant. $40 billed monthly.
Sync Licenses$3.20
per connection / month, billed annually; starting price
For group accounts: an admin creates and manages sync connections centrally, with no end-user setup. Starts at $4 billed monthly.
Howie
Team$25
per month for 1,250 shared workspace credits
Unlimited teammates on one credit pool. Larger pools run up to 150,000 credits for $2,500 a month, and a custom assistant email adds $20 a month.
EnterpriseCustom
A tailored credit pool with invoicing and custom billing terms, security review support and a DPA, an SLA and dedicated onboarding.
Ways to pay less
CalendarBridge
- Annual discount
20% off with yearly billing
The pricing page marks yearly billing as 20% off: Basic is $48 a year against $5 a month, Premium $96 against $10 and Pro $384 against $40.
Howie
No public discounts listed.
