# Missnote vs Killer Math

The clearest difference is in-app purchases: Killer Math at none against Missnote's 4. Killer Math also leads on update cadence (every 4 days vs fortnightly). Missnote's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Missnote sells 4 in-app purchases, starting at $3.99 per month. Killer Math asks for nothing beyond the download.

Missnote ships an update fortnightly, Killer Math every 4 days. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Missnote | Killer Math |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 73 MB | 46 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mooncode](https://appshunter.io/developer/1742583074) | [CHUL HYUN LEE](https://appshunter.io/developer/297999549) |

## What reviewers say

### Missnote

[App page](https://appshunter.io/ios/app/missnote-mistake-journal/id6755079356)

This app helps students and test-takers transform incorrect answers into learning opportunities. Save missed questions with photos or text, organize them with tags and custom notebooks, and receive AI-powered review suggestions. It facilitates a smarter study routine by prioritizing what needs reviewing.

**Highlights:** Save questions via photo or text, Organize with tags and custom notebooks, AI-powered review suggestions, Spaced repetition review timing, Review reminders, Cross-device syncing, Create and print PDFs

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pro - 1 month | $3.99 | per month |
| Sync Plus - 1 month | $3.99 | per month |
| pro - 1 year | $32.99 | per year |
| Pro - lifetime | $5.99 | one-time |


### Killer Math

[App page](https://appshunter.io/ios/app/killer-math/id6785559161)

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

**In-app purchases:** none


## Frequently asked questions

### Is Missnote free?

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

### Is Killer Math free?

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

### Do Missnote or Killer Math have ads?

Killer Math shows ads; Missnote does not.

### Which is updated more often, Missnote or Killer Math?

Missnote ships an update fortnightly, and Killer Math every 4 days. Most recently, Missnote was updated on October 8, 2026 and Killer Math on October 1, 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.*