# Sentarm vs Alarm One

Sentarm and Alarm One both sit at 4.2 stars, but that hides the real split: 80% of Alarm One's written reviews are positive against 50% of Sentarm's. Alarm One also leads on ratings volume (16 vs 5). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Sentarm sells 4 one-off in-app purchases and Alarm One sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.2 for Sentarm against 4.3 for Alarm One. Both are backed by a comparable volume of ratings — 5 and 16 respectively. Written reviews are what separate them: 50% of Sentarm's written reviews are positive against 80% of Alarm One's.

Sentarm ships an update weekly, Alarm One every 2 weeks. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sentarm | Alarm One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/sentarm/id6747161489/reviews) | **[4.3 (16 ratings)](https://appshunter.io/ios/app/alarm-one-shift-alarm-clock/id6748434148/reviews)** |
| Number of ratings | 5 | **16** |
| Positive reviews | 50.0% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 45 MB | 82 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [永康 梁](https://appshunter.io/developer/1789349442) | [Qingzhe Wu](https://appshunter.io/developer/1570122439) |

## What reviewers say

### Sentarm

[App page](https://appshunter.io/ios/app/sentarm/id6747161489)

This smart alarm assistant simplifies setting alarms for complex and rotating schedules. It offers holiday recognition, custom calendars, and a minimalist interface for ease of use. Widgets, dark mode, and multi-language support enhance the user experience.

**Highlights:** Customizable work schedule alarms, Automatic holiday and special date skipping, Multiple regional and custom calendars, Convenient alarm and calendar widgets, Dark mode and multi-language support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Sound | Free | one-time |
| Custom Calendar | $0.99 | one-time |
| Widgets | $0.99 | one-time |
| Missions | $1.99 | one-time |


### Alarm One

[App page](https://appshunter.io/ios/app/alarm-one-shift-alarm-clock/id6748434148)

Manage complex schedules with flexible alarms for rotating shifts, international time zones, and recurring events. Organize alarms into groups and control them with a single tap. Features custom wake-up sounds, widgets, timers, and stopwatch functionality.

**Highlights:** Rotating shift alarms, World clock and time zones, Alarm grouping, Custom wake-up sounds, Home and lock screen widgets, Timers and stopwatch, iCloud sync across devices

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $1.99 | per month |
| Premium (Yearly) | $6.99 | per year |
| Lifetime premium | $16.99 | one-time |


## Frequently asked questions

### Is Sentarm free?

Sentarm is free to download, with in-app purchases available.

### Is Alarm One free?

Alarm One is free to download, with in-app purchases available.

### Which has better reviews, Sentarm or Alarm One?

Alarm One is rated higher. Sentarm averages 4.2 out of 5 from 5 ratings, while Alarm One averages 4.3 from 16 ratings.

### Do Sentarm or Alarm One have ads?

Neither Sentarm nor Alarm One shows ads.

### Which is updated more often, Sentarm or Alarm One?

Sentarm ships an update weekly, and Alarm One every 2 weeks. Most recently, Sentarm was updated on October 23, 2026 and Alarm One on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*