# Zalpha vs Sentinelle

The clearest difference is iOS requirement: Zalpha at 13.0 against Sentinelle's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Zalpha ships an update every 2 weeks, Sentinelle every 9 days. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Zalpha | Sentinelle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Size | 99 MB | 50 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zalpha](https://appshunter.io/developer/1600492585) | [Conche Julien](https://appshunter.io/developer/1896678599) |

## What reviewers say

### Zalpha

[App page](https://appshunter.io/ios/app/zalpha/id1601842597)

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

**In-app purchases:** none


### Sentinelle

[App page](https://appshunter.io/ios/app/sentinelle-tracker-insider/id6769673763)

**In-app purchases:** none


## Frequently asked questions

### Is Zalpha free?

Zalpha is free to download, with no in-app purchases.

### Is Sentinelle free?

Sentinelle is free to download, with no in-app purchases.

### Do Zalpha or Sentinelle have ads?

Neither Zalpha nor Sentinelle shows ads.

### Which is updated more often, Zalpha or Sentinelle?

Zalpha ships an update every 2 weeks, and Sentinelle every 9 days. Most recently, Zalpha was updated on October 7, 2026 and Sentinelle on October 16, 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.*