# Till Zero vs Odd One

The clearest difference is in-app purchases: Odd One at none against Till Zero's 1. Odd One also leads on ads (none vs shown) and update cadence (weekly vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Till Zero sells 1 one-off in-app purchase. Odd One asks for nothing beyond the download.

Till Zero ships an update every 5 weeks, Odd One weekly. The most recent releases landed on September 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Till Zero | Odd One |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 11 MB | 23 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Lukasz Rausz](https://appshunter.io/developer/1896744317) | [Lucas Hesseldieck](https://appshunter.io/developer/6788079537) |

## What reviewers say

### Till Zero

[App page](https://appshunter.io/ios/app/till-zero-a-math-puzzle-game/id6778566865)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Odd One

[App page](https://appshunter.io/ios/app/odd-one/id6788079535)

A minimalist brain-training puzzle game where players identify the single tile that breaks a pattern in a grid. It offers four distinct game modes, including classic, arcade, endless, and daily challenges, all designed for calm, logical play.

**Highlights:** Four distinct game modes, Minimalist brain-training puzzles, Handcrafted and generated levels, No timer or time-based challenges, Color-assist mode for color-blind players, Light and dark mode, Calm piano soundtrack

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

**In-app purchases:** none


## Frequently asked questions

### Is Till Zero free?

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

### Is Odd One free?

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

### Do Till Zero or Odd One have ads?

Till Zero shows ads; Odd One does not.

### Which is updated more often, Till Zero or Odd One?

Till Zero ships an update every 5 weeks, and Odd One weekly. Most recently, Till Zero was updated on September 24, 2026 and Odd One on October 10, 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.*