# MindMirror vs Knock Reminder

The clearest difference is update cadence: MindMirror at every 3 weeks against Knock Reminder's every 2 months. Knock Reminder's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. MindMirror sells 2 in-app purchases, starting at $4.99 per month and Knock Reminder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MindMirror ships an update every 3 weeks, Knock Reminder every 2 months. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | MindMirror | Knock Reminder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 31 MB | 34 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Wolfwalkers Labs](https://appshunter.io/developer/1829674226) | [Seki Hiroyasu](https://appshunter.io/developer/6792599749) |

## What reviewers say

### MindMirror

[App page](https://appshunter.io/ios/app/mindmirror-smart-notes/id6749266358)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindMirror Pro | $4.99 | per month |
| MindMirror Pro | $47.99 | per year |


### Knock Reminder

[App page](https://appshunter.io/ios/app/knock-reminder/id6794741120)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knock Reminder Pro | $2.99 | one-time |


## Frequently asked questions

### Is MindMirror free?

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

### Is Knock Reminder free?

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

### Do MindMirror or Knock Reminder have ads?

Neither MindMirror nor Knock Reminder shows ads.

### Which is updated more often, MindMirror or Knock Reminder?

MindMirror ships an update every 3 weeks, and Knock Reminder every 2 months. Most recently, MindMirror was updated on October 15, 2026 and Knock Reminder on October 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.*