# All Zero Puzzle vs lostphone#9

The clearest difference is ads: lostphone#9 at none against All Zero Puzzle's shown. lostphone#9 also leads on monetization model (free vs ad-supported) and iOS requirement (7.0 vs 15.6). All Zero Puzzle's advantage is review sentiment (80% vs 50%). On price, update cadence, 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.

All Zero Puzzle ships an update every 15 months, lostphone#9 every 19 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | All Zero Puzzle | lostphone#9 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **80.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 15 months** | Every 19 months |
| Monetization | Ad-supported | **Free** |
| Size | 86 MB | 45 MB |
| Requires iOS | 15.6 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [be-style](https://appshunter.io/developer/534131442) | [takeshi nagahara](https://appshunter.io/developer/1173326215) |

## What reviewers say

### All Zero Puzzle

[App page](https://appshunter.io/ios/app/all-zero-puzzle/id1139201787)

A puzzle game where you manipulate numbers on panels to make all question panels zero. It offers 200 free levels with increasing difficulty and a daily challenge. Practice addition and subtraction with helpful hints and an undo function.

**Highlights:** Solve 200 free levels, Increasing difficulty, Daily challenge, Addition and subtraction practice, Hint and undo functions, No time limit, Leaderboard integration

**Features:** Vision Pro support

**In-app purchases:** none


### lostphone#9

[App page](https://appshunter.io/ios/app/lostphone9/id1190166441)

Test your memory by trying to recall phone numbers. This game challenges you to remember more numbers than the average person in today's digital age.

**Highlights:** Memory challenge, Phone number recall, Nostalgic theme, Simple gameplay

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

**In-app purchases:** none


## Frequently asked questions

### Is All Zero Puzzle free?

All Zero Puzzle is free to download, with no in-app purchases.

### Is lostphone#9 free?

lostphone#9 is free to download, with no in-app purchases.

### Do All Zero Puzzle or lostphone#9 have ads?

All Zero Puzzle shows ads; lostphone#9 does not.

### Which is updated more often, All Zero Puzzle or lostphone#9?

All Zero Puzzle ships an update every 15 months, and lostphone#9 every 19 months. Most recently, All Zero Puzzle was updated on October 6, 2026 and lostphone#9 on October 6, 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.*