Choose OnTimer if
iPhone users who want an automatic punctuality system around each event, including custom sounds, event cards, Early Warning, Time To Leave, and Time To Fly.
Calendar alarm comparison
OnTimer vs Pealo
Both products turn calendar events into alarms automatically. OnTimer is the stronger fit when you want event-specific sounds, Early Warning, traffic-aware Time To Leave, and Time To Fly in one iPhone workflow. Pealo is the stronger fit when broad device coverage—including Android, iPad, Mac, and web—is the priority.
Last reviewed October 13, 2026
Choose Pealo if
People who need calendar alarms on more device types or want Pealo's calendar-alarm workflow across iPhone, iPad, Mac, Android, and the web.
Key differences
| What to compare | OnTimer | Pealo |
|---|---|---|
| Core job | Automatic alarms plus event and travel controls | Automatic real alarms from calendar events |
| Calendars | Apple, Google, and Outlook | Google, Outlook, and iCloud |
| Event controls | Alarm, sound, Early Warning, and calendar access on each event card | Shows events and lets users skip an alarm; per-calendar auto-alarm rules |
| Travel timing | Time To Leave and Time To Fly | Not described on the reviewed product page |
| Platforms | iPhone | iPhone, iPad, Mac, Android, and web |
Keep your calendar. Add an alarm layer.
OnTimer is free for one calendar provider on iPhone.