# ReadOn vs ML_Engineering

The clearest difference is update cadence: ReadOn at every 6 days against ML_Engineering's every 3 weeks. ML_Engineering's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. ReadOn sells 2 in-app purchases, starting at $4.99 per 7 days and ML_Engineering sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReadOn ships an update every 6 days, ML_Engineering every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ReadOn | ML_Engineering |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Size | 72 MB | 5 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Lucas Goldner](https://appshunter.io/developer/1540753257) | [Luke Mclaughlin](https://appshunter.io/developer/1893671036) |

## What reviewers say

### ReadOn

[App page](https://appshunter.io/ios/app/readon-read-in-any-language/id6757393728)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $24.99 | per year |


### ML_Engineering

[App page](https://appshunter.io/ios/app/ml-engineering/id6789723889)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ML_Engineering Pro | $1.99 | per month |


## Frequently asked questions

### Is ReadOn free?

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

### Is ML_Engineering free?

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

### Do ReadOn or ML_Engineering have ads?

Neither ReadOn nor ML_Engineering shows ads.

### Which is updated more often, ReadOn or ML_Engineering?

ReadOn ships an update every 6 days, and ML_Engineering every 3 weeks. Most recently, ReadOn was updated on October 24, 2026 and ML_Engineering on October 25, 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.*