Cal.com vs Calerto
Two Productivity products side by side.
| Cal.com | Calerto | |
|---|---|---|
| What it does | Open-source scheduling you can self-host | Turns calendar meetings into loud iOS alarms |
| Pricing | Free plan | Free plan |
| Categories | Productivity, Business | Productivity |
| Tags | Scheduling, Self-hosted, Open Source | iOS, macOS, Scheduling, Privacy-first |
| Score | 36%14 votes | 38%8 votes |
| Website | cal.com | apps.apple.com |
| Founder | Not listed | Not listed |
| Listed | Sep 12, 2025 | Oct 3, 2026 |
Which should you pick?
- Both are listed as free with paid plans, so price alone will not settle it.
- Too close to call: 36% for Cal.com and 38% for Calerto.
- Only Cal.com is tagged Self-hosted and Open Source.
- Only Calerto is tagged iOS, macOS and Privacy-first.
Positioning is from each listing, not an endorsement.
About Cal.com
Cal.com handles meeting scheduling: availability rules, calendar sync, buffers, routing forms and team round-robin.
Unlike most scheduling tools it is open source, so it can run on your own infrastructure with your own calendar data.
About Calerto
Calerto reads upcoming events from Apple Calendar and Google Calendar and sets a real alarm before each meeting, with a prep-time buffer you choose. Presets run from 5 to 60 minutes, and you can type any custom buffer up to a full day. It uses iOS AlarmKit, so the alarms ring through Do Not Disturb and silent mode. Live Activities show your next meeting on the Lock Screen.
You set an alarm with one tap or swipe. Alarms can be paused without being deleted, and recurring events can get repeating alarms. A countdown card shows the next meeting. When an alarm rings, a Join button for Zoom, Google Meet, Microsoft Teams or Webex becomes active five minutes before the start time. Snooze only works until the meeting begins. The Pro tier adds auto-alarms for every meeting in the next seven days and connections to more than one calendar.
Calendar data stays on the device, and the App Store listing says no data is collected. Calerto runs on iPhone, iPad and Mac and needs OS version 26 or later. The app is free to download. Pro costs $2.99 a month, $12.99 a year, or $24.99 for lifetime access.