# Silent Observer vs SUNRISE OTA

The clearest difference is update cadence: SUNRISE OTA at every 3 months against Silent Observer's every 34 months. Silent Observer's advantage is iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Silent Observer ships an update every 34 months, SUNRISE OTA every 3 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Silent Observer | SUNRISE OTA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 3 months** |
| Size | 30 MB | 9 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Navigate360, LLC](https://appshunter.io/developer/1562199710) | [Sr Technology Co., Ltd.](https://appshunter.io/developer/1225091618) |

## What reviewers say

### Silent Observer

[App page](https://appshunter.io/ios/app/silent-observer/id1209909707)

**Features:** macOS Compatibility

**In-app purchases:** none


### SUNRISE OTA

[App page](https://appshunter.io/ios/app/sunrise-ota/id1492668461)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Silent Observer free?

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

### Is SUNRISE OTA free?

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

### Do Silent Observer or SUNRISE OTA have ads?

Neither Silent Observer nor SUNRISE OTA shows ads.

### Which is updated more often, Silent Observer or SUNRISE OTA?

Silent Observer ships an update every 34 months, and SUNRISE OTA every 3 months. Most recently, Silent Observer was updated on October 26, 2026 and SUNRISE OTA on October 26, 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.*