# Deep Tech Stars vs Mastery

The clearest difference is in-app purchases: Deep Tech Stars at none against Mastery's 3. Deep Tech Stars also leads on iOS requirement (15.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Mastery sells 3 in-app purchases, starting at $2.99 per month. Deep Tech Stars asks for nothing beyond the download.

Deep Tech Stars ships an update monthly, Mastery every 2 months. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Deep Tech Stars | Mastery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 70 MB | 27 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Deep Tech Stars](https://appshunter.io/developer/1787365931) | [Adam Kovacs](https://appshunter.io/developer/1814096456) |

## What reviewers say

### Deep Tech Stars

[App page](https://appshunter.io/ios/app/deep-tech-stars/id6739868772)

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

**In-app purchases:** none


### Mastery

[App page](https://appshunter.io/ios/app/mastery-habit-tracker/id6759011987)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mastery Pro Monthly | $2.99 | per month |
| Annual | $14.99 | per year |
| Mastery Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Deep Tech Stars free?

Deep Tech Stars is free to download, with no in-app purchases.

### Is Mastery free?

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

### Do Deep Tech Stars or Mastery have ads?

Neither Deep Tech Stars nor Mastery shows ads.

### Which is updated more often, Deep Tech Stars or Mastery?

Deep Tech Stars ships an update monthly, and Mastery every 2 months. Most recently, Deep Tech Stars was updated on September 15, 2026 and Mastery on September 9, 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.*