# Proof ERP vs Onest School

The clearest difference is update cadence: Proof ERP at every 2 months against Onest School's every 6 months. Onest School's advantage is iOS requirement (13.0 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.

Proof ERP ships an update every 2 months, Onest School every 6 months. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Proof ERP | Onest School |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 104 MB | 80 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NLET](https://appshunter.io/developer/1570619872) | [USMG INC](https://appshunter.io/developer/1620313190) |

## What reviewers say

### Proof ERP

[App page](https://appshunter.io/ios/app/proof-erp/id6737055927)

**Features:** macOS Compatibility

**In-app purchases:** none


### Onest School

[App page](https://appshunter.io/ios/app/onest-school/id6738462867)

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

**In-app purchases:** none


## Frequently asked questions

### Is Proof ERP free?

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

### Is Onest School free?

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

### Do Proof ERP or Onest School have ads?

Neither Proof ERP nor Onest School shows ads.

### Which is updated more often, Proof ERP or Onest School?

Proof ERP ships an update every 2 months, and Onest School every 6 months. Most recently, Proof ERP was updated on September 23, 2026 and Onest School on September 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.*