OneCal vs AllMyMeetings: Which Calendar Sync Tool Is Right for You?

OneCal and AllMyMeetings are both modern calendar sync tools built for professionals who manage multiple calendars across Google, Outlook, and iCloud. Both offer bidirectional sync, privacy controls, and clean interfaces. But they take fundamentally different approaches to how sync is configured and what additional features are included.

This guide compares every meaningful difference so you can make an informed choice.

TL;DR: OneCal is great if you want multi-way sync and a minimal feature set. AllMyMeetings is the better choice if you need scheduling pages, an AI assistant, team features, or a free tier.

Quick comparison overview

How sync configuration differs

The biggest architectural difference between these tools is how you set up sync.

OneCal: Multi-way sync groups

OneCal lets you create a single sync group that connects multiple calendars simultaneously. If you add calendars A, B, and C to a group, events on any calendar are synced to all others automatically.

This approach is simpler to configure when you have many calendars: one group handles everything. But it offers less granular control — you can't easily set different privacy modes for different calendar pairs within the same group.

AllMyMeetings: Pairwise sync pairs

AllMyMeetings uses pairwise sync pairs, where each connection links exactly two calendars. To sync calendars A, B, and C, you create three pairs: A-B, A-C, and B-C.

This approach gives you fine-grained control: you might sync your work and personal calendars in free/busy mode (hiding details) while syncing your two personal calendars in full-detail mode. Each pair has its own direction, mode, and settings.

The tradeoff: more pairs to configure for complex setups. But for the most common scenario (2-4 calendars), the difference is minimal.

Provider support

Both tools support the three major calendar providers. AllMyMeetings adds ICS feed support for read-only calendar imports.

AllMyMeetings supports Google, Outlook, iCloud, and ICS feeds. OneCal supports Google, Outlook, and iCloud.

ICS feed support matters if you use niche calendar tools, subscribe to sports schedules, or need to import read-only calendars from services that only export ICS.

Sync speed and reliability

Both tools use real-time webhooks for Google and Outlook, meaning events propagate in seconds. For iCloud (which doesn't support webhooks), both use polling — checking for changes on a regular interval.

Both tools achieve under 5-second sync for Google and Outlook via webhooks, with iCloud on a fast polling schedule of 2-5 minutes.

In practice, sync speed is comparable. Neither tool has a meaningful advantage here.

Privacy controls

Privacy controls are crucial when syncing work and personal calendars. Both tools offer privacy modes, but with different granularity.

AllMyMeetings' pairwise model gives it an advantage here: you can set different privacy modes for different calendar pairs. OneCal's group model applies the same settings to all calendars in a group.

AllMyMeetings also offers a "private" mode (distinct from free/busy) and configurable title suffixes like "[Work]" or "[Personal]" on synced events.

Scheduling pages

This is a clear differentiator. AllMyMeetings includes built-in scheduling pages (similar to Calendly) that check availability across all connected calendars before showing open slots.

AllMyMeetings includes scheduling pages on Pro and Business plans. OneCal does not offer scheduling pages, so you'd need a separate tool like Calendly or Cal.com.

If you currently pay for Calendly ($8-16/month) alongside your sync tool, AllMyMeetings' built-in scheduling can save you that additional cost.

AI scheduling assistant

AllMyMeetings offers an AI scheduling assistant on the Business plan. CC the assistant on an email thread, and it reads your availability across all calendars, proposes times, and books meetings automatically.

AllMyMeetings' AI assistant automates email-based scheduling by reading availability across all calendars. OneCal does not offer an AI assistant.

OneCal has no equivalent feature. If AI-assisted scheduling matters to you, AllMyMeetings is the only choice between these two.

Team features

Both tools support teams, but with different approaches.

AllMyMeetings allows team-level sync pairs (where the sync configuration belongs to the team rather than an individual) and includes sync logs visible to team administrators.

Sync monitoring and logs

AllMyMeetings provides detailed sync logs showing every sync operation, including created, updated, and deleted events with timestamps. This is invaluable for troubleshooting and for teams that need audit trails.

AllMyMeetings includes comprehensive sync logs and monitoring. OneCal does not expose detailed sync operation logs.

OneCal shows basic sync status but doesn't provide the operation-level detail that AllMyMeetings does.

Pricing comparison

At the $5/month tier, AllMyMeetings includes more (4 accounts, 6 sync pairs, scheduling pages) than OneCal's Starter (2 calendars). At the top tier, AllMyMeetings Business ($15/month) includes unlimited sync pairs and an AI assistant, while OneCal Premium ($25/month) offers more calendars but no AI or scheduling.

Who should choose OneCal?

OneCal is the right choice if:

• You prefer multi-way sync groups over pairwise configuration
• You have 5+ calendars and want simpler setup
• You don't need scheduling pages or AI features
• You value OneCal's modern UI and design aesthetic
• You're comfortable with no free tier

Who should choose AllMyMeetings?

AllMyMeetings is the right choice if:

• You want a free tier for basic sync
• You need scheduling pages built into your sync tool
• AI-assisted email scheduling would save you time
• You need fine-grained privacy controls per calendar pair
• You manage a team and need sync logs and shared configurations
• You use ICS feeds from niche calendar sources
• You want more features at a lower price point

The verdict

Both are solid, modern tools. OneCal's multi-way sync is elegant for users with many calendars who want minimal configuration. AllMyMeetings offers more features per dollar — scheduling pages, AI assistant, sync logs, ICS feeds, and a free tier — making it the better overall value for most professionals.

The best way to decide: try both. OneCal offers a 14-day trial. AllMyMeetings has a permanent free tier. Connect your calendars, run them side by side, and see which workflow you prefer.

Try AllMyMeetings free — no trial expiration, no credit card. Sign up here and sync your first calendar pair in under two minutes.