# ErrataCorrige vs KOYOE

The clearest difference is in-app purchases: KOYOE at none against ErrataCorrige's 4. ErrataCorrige's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. ErrataCorrige sells 4 one-off in-app purchases. KOYOE asks for nothing beyond the download.

ErrataCorrige ships an update every 4 weeks, KOYOE fortnightly. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | ErrataCorrige | KOYOE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 44 MB | 47 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Massimo Pavanel](https://appshunter.io/developer/1448634706) | [Jiangsu Koyoe Energy Technology Co.,Ltd](https://appshunter.io/developer/1501799525) |

## What reviewers say

### ErrataCorrige

[App page](https://appshunter.io/ios/app/erratacorrige/id1448634707)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 errataCoin recharge | $1.99 | one-time |
| 50 errataCoin recharge | $2.99 | one-time |
| 75 errataCoin recharge | $3.99 | one-time |
| 100 errataCoin reload | $4.99 | one-time |


### KOYOE

[App page](https://appshunter.io/ios/app/koyoe/id1501799586)

This platform allows users to centrally monitor, analyze, and display data from power stations. It provides insights into operational status, energy efficiency, and revenue estimation, offering a scientific basis for economic operations and power station design. Real-time communication aids in quick fault diagnosis for safe operation.

**Highlights:** Centralized monitoring of power station data, Analysis of energy efficiency and operation status, Revenue estimation for power stations, Real-time fault information processing, Technical support for safe power station operation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ErrataCorrige free?

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

### Is KOYOE free?

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

### Do ErrataCorrige or KOYOE have ads?

Neither ErrataCorrige nor KOYOE shows ads.

### Which is updated more often, ErrataCorrige or KOYOE?

ErrataCorrige ships an update every 4 weeks, and KOYOE fortnightly. Most recently, ErrataCorrige was updated on October 3, 2026 and KOYOE on September 28, 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.*