# StellKey vs MammoScreen

The clearest difference is in-app purchases: MammoScreen at none against StellKey's 6. MammoScreen also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. StellKey sells 6 in-app purchases, starting at $9.99 per month. MammoScreen asks for nothing beyond the download.

StellKey ships an update fortnightly, MammoScreen monthly. The most recent releases landed on October 8, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | StellKey | MammoScreen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/stellkey-chores-tracker/id1591228817/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Subscription | — |
| Size | 125 MB | 19 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vaqstar](https://appshunter.io/developer/1591228819) | [Elaros](https://appshunter.io/developer/1544802505) |

## What reviewers say

### StellKey

[App page](https://appshunter.io/ios/app/stellkey-chores-tracker/id1591228817)

This app helps children build healthy habits and routines through engaging, customizable programs. It offers motivational rewards and real-time progress tracking, developed with insights from child psychologists and educators.

**Highlights:** Customizable routines, Interactive rewards system, Real-time progress tracking, Expert-approved methods, Virtual friend motivation

**Features:** Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly base subscription | $9.99 | per month |
| Yearly bases subscription | $69.99 | per year |
| 1 Month Subscription | $4.99 | one-time |
| 12 Month Subscriptions | $39.99 | one-time |
| Lifetime Subscriptions | $59.99 | one-time |
| Lifetime Subscription | $89.99 | one-time |


### MammoScreen

[App page](https://appshunter.io/ios/app/mammoscreen/id6479296562)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is StellKey free?

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

### Is MammoScreen free?

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

### Do StellKey or MammoScreen have ads?

Neither StellKey nor MammoScreen shows ads.

### Which is updated more often, StellKey or MammoScreen?

StellKey ships an update fortnightly, and MammoScreen monthly. Most recently, StellKey was updated on October 8, 2026 and MammoScreen on October 27, 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.*