# MediMinder vs 21 Days Challenge

The clearest difference is in-app purchases: 21 Days Challenge at none against MediMinder's 4. 21 Days Challenge also leads on update cadence (every 10 days vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. MediMinder sells 4 in-app purchases, starting at $3.99 per month. 21 Days Challenge asks for nothing beyond the download.

MediMinder ships an update every 3 weeks, 21 Days Challenge every 10 days. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MediMinder | 21 Days Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 22 MB | 46 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [其辉 陈](https://appshunter.io/developer/1786921793) | [Tung Bui Thanh](https://appshunter.io/developer/1504830403) |

## What reviewers say

### MediMinder

[App page](https://appshunter.io/ios/app/mediminder-pill-tracker/id6742391221)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Plan | $3.99 | per month |
| Premium Trial Plan | $5.99 | per year |
| Premium Annual Plan | $19.99 | per year |
| Premium Lifetime Access | $49.99 | one-time |


### 21 Days Challenge

[App page](https://appshunter.io/ios/app/21-days-challenge/id6753333556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MediMinder free?

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

### Is 21 Days Challenge free?

21 Days Challenge is free to download, with no in-app purchases.

### Do MediMinder or 21 Days Challenge have ads?

Neither MediMinder nor 21 Days Challenge shows ads.

### Which is updated more often, MediMinder or 21 Days Challenge?

MediMinder ships an update every 3 weeks, and 21 Days Challenge every 10 days. Most recently, MediMinder was updated on October 28, 2026 and 21 Days Challenge on November 5, 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.*