# Sentarm vs Aspect Ratio Pro

The clearest difference is review sentiment: Aspect Ratio Pro at 100% against Sentarm's 50%. Aspect Ratio Pro also leads on in-app purchases (none vs 4) and iOS requirement (18.6 vs 26.0). Sentarm's advantage is price (Free vs $3.99) and update cadence (weekly vs every 3 weeks). On ads and device support there is nothing between them.

Sentarm is free to download; Aspect Ratio Pro costs $3.99 up front. Sentarm sells 4 one-off in-app purchases. Aspect Ratio Pro asks for nothing beyond the download.

Sentarm holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Sentarm has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Sentarm's written reviews are positive against 100% of Aspect Ratio Pro's, so the app with the better star average is not the one people write more warmly about.

Sentarm ships an update weekly, Aspect Ratio Pro every 3 weeks. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Sentarm | Aspect Ratio Pro |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/sentarm/id6747161489/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/aspect-ratio-pro/id6747417099/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 45 MB | 42 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [永康 梁](https://appshunter.io/developer/1789349442) | [App ahead GmbH](https://appshunter.io/developer/955848754) |

## 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 |


### Aspect Ratio Pro

[App page](https://appshunter.io/ios/app/aspect-ratio-pro/id6747417099)

This app helps you quickly solve for an unknown value in a proportion. Simply input three known numbers, and it will calculate the fourth, making ratio and proportion calculations effortless.

**Highlights:** Rule of three calculations, Instant fourth value calculation, Ratio and proportion solver, Intuitive input interface, Supports iPhone and Mac

**In-app purchases:** none


## Frequently asked questions

### Is Sentarm free?

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

### Is Aspect Ratio Pro free?

Aspect Ratio Pro costs $3.99, with no in-app purchases.

### Which has better reviews, Sentarm or Aspect Ratio Pro?

Sentarm is rated higher. Sentarm averages 4.2 out of 5 from 5 ratings, while Aspect Ratio Pro averages 4.0 from 1 ratings.

### Do Sentarm or Aspect Ratio Pro have ads?

Neither Sentarm nor Aspect Ratio Pro shows ads.

### Which is updated more often, Sentarm or Aspect Ratio Pro?

Sentarm ships an update weekly, and Aspect Ratio Pro every 3 weeks. Most recently, Sentarm was updated on October 5, 2026 and Aspect Ratio Pro on October 15, 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.*