# Stacked AI vs ML_Engineering

The clearest difference is in-app purchases: Stacked AI at none against ML_Engineering's 1. Stacked AI also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ML_Engineering sells 1 in-app purchase, starting at $1.99 per month. Stacked AI asks for nothing beyond the download.

Stacked AI ships an update daily, ML_Engineering every 3 weeks. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Stacked AI | ML_Engineering |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 35 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Cuevas](https://appshunter.io/developer/1857075196) | [Luke Mclaughlin](https://appshunter.io/developer/1893671036) |

## What reviewers say

### Stacked AI

[App page](https://appshunter.io/ios/app/stacked-ai/id6756550526)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Stacked AI free?

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

### Is ML_Engineering free?

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

### Do Stacked AI or ML_Engineering have ads?

Neither Stacked AI nor ML_Engineering shows ads.

### Which is updated more often, Stacked AI or ML_Engineering?

Stacked AI ships an update daily, and ML_Engineering every 3 weeks. Most recently, Stacked AI was updated on October 5, 2026 and ML_Engineering on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*