# Mark6 Reminder vs A chang

The clearest difference is ads: A chang at none against Mark6 Reminder's shown. A chang also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (13 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mark6 Reminder ships an update every 2 months, A chang fortnightly. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Mark6 Reminder | A chang |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 37 MB | 2 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Heung Kai Chan](https://appshunter.io/developer/1569414929) | [Shenzhen Shenglong Technology Co., Ltd](https://appshunter.io/developer/1748314415) |

## What reviewers say

### Mark6 Reminder

[App page](https://appshunter.io/ios/app/mark6-reminder/id6744552226)

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

**In-app purchases:** none


### A chang

[App page](https://appshunter.io/ios/app/a-chang/id6744846154)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mark6 Reminder free?

Mark6 Reminder is free to download, with no in-app purchases.

### Is A chang free?

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

### Do Mark6 Reminder or A chang have ads?

Mark6 Reminder shows ads; A chang does not.

### Which is updated more often, Mark6 Reminder or A chang?

Mark6 Reminder ships an update every 2 months, and A chang fortnightly. Most recently, Mark6 Reminder was updated on September 23, 2026 and A chang on September 20, 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.*