# sf_ota vs UnitSnap

The clearest difference is in-app purchases: sf_ota at none against UnitSnap's 1. sf_ota also leads on update cadence (every 3 days vs every 4 months) and iOS requirement (12.0 vs 17.6). On price there is nothing between them.

Both are free to download. UnitSnap sells 1 one-off in-app purchase. sf_ota asks for nothing beyond the download.

sf_ota ships an update every 3 days, UnitSnap every 4 months. The most recent releases landed on October 27, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | sf_ota | UnitSnap |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | **Every 3 days** | Every 4 months |
| Size | 31 MB | 4 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Weida Technology Co., Ltd.](https://appshunter.io/developer/1650534686) | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) |

## What reviewers say

### sf_ota

[App page](https://appshunter.io/ios/app/sf-ota/id6502590914)

**In-app purchases:** none


### UnitSnap

[App page](https://appshunter.io/ios/app/unitsnap/id6742785813)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is sf_ota free?

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

### Is UnitSnap free?

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

### Which is updated more often, sf_ota or UnitSnap?

sf_ota ships an update every 3 days, and UnitSnap every 4 months. Most recently, sf_ota was updated on October 27, 2026 and UnitSnap on October 14, 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.*