# One-Time Alarm & Calendar — Perfect for shift and reminder

> Perfect for shift and reminder (iPhone/iPad app by LegStart Inc..)

- Source: https://appshunter.io/ios/app/one-time-alarm-and-calendar/id6759246387 (this page in markdown: same URL + `.md`)
- Developer: [LegStart Inc.](https://appshunter.io/developer/1823972857)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 26.0 · 49 MB
- Languages: American English, Japanese
- Released: 2026-02-18
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/one-time-alarm-and-calendar/id6759246387/reviews.md

## What is One?

Worried you’ll forget tomorrow’s shift alarm?
Need reliable alerts without loud sounds?

CAlarm solves it with date-based alarms and full-screen notifications — even on the lock screen, so you never miss an important reminder.

Manage everything in one app.
Add alarms directly to calendar events, and save templates for one-tap shift & alarm setup.

You can also view upcoming schedules with widgets.

Features
• Date-based alarms for specific days
• Calendar schedule management with alarms
• One-tap templates for shifts & alarms
• Repeat alarms by weekday
• Snooze support
• Advance alarm notifications (push notifications)
• Multiple alarm sounds
• Customizable theme colors
• Dark mode support
• Widgets for upcoming schedules
• Long-press to duplicate alarms

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Customize color theme | $0.49 | one-time |



## Version history (last 5 releases)

### 3.4.5 — 2026-08-29

Fix minor bugs

### 3.4.4 — 2026-08-26

- Add widgets for schedules
- Add a lock screen widget (for Premium)

### 3.4.3 — 2026-08-20

Fix minor bugs

### 3.4.2 — 2026-08-14

- Improve design
- add a feature of announcement

### 3.4.1 — 2026-08-11

Improve complicated repeat settings for alarms

## Apps similar to One

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Yobirin: Weekly Alarm Clock](https://appshunter.io/ios/app/yobirin-weekly-alarm-clock/id6760646573) | 5.0 (2) | Free | Utilities |
| [Akaru - Alarm Calendar](https://appshunter.io/ios/app/akaru-alarm-calendar/id6760894435) | — | Free | Utilities |
| [SmartAlarm - Alarm Clock](https://appshunter.io/ios/app/smartalarm-alarm-clock/id6777640004) | — | Free | Utilities |
| [MultiAlarm – Group Your Alarms](https://appshunter.io/ios/app/multialarm-group-your-alarms/id6751745158) | 5.0 (1) | Free | Utilities |
| [Toki - Date & Time Alarm](https://appshunter.io/ios/app/toki-date-and-time-alarm/id6780341684) | — | Free | Utilities |
| [AlarmCal:Daily Routine Planner](https://appshunter.io/ios/app/alarmcaldaily-routine-planner/id6756020537) | — | Free | Utilities |

## More apps by LegStart Inc.

- [AIが感想をくれる写真日記 - PicLog](https://appshunter.io/ios/app/ai-piclog/id6758348266)

All apps by LegStart Inc.: https://appshunter.io/developer/1823972857

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*