# Find Number! vs Serial 7s

The clearest difference is update cadence: Serial 7s at every 5 months against Find Number!'s every 20 months. On price, ads, in-app purchases and monetization model there is nothing between them.

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

Find Number! ships an update every 20 months, Serial 7s every 5 months. Both last shipped on October 12, 2026.

## The numbers

| Metric | Find Number! | Serial 7s |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/serial-7s/id6480178276/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 180 MB | 42 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [MoreThanThat](https://appshunter.io/developer/1709933627) | [HFX Lab](https://appshunter.io/developer/1139262927) |

## What reviewers say

### Find Number!

[App page](https://appshunter.io/ios/app/find-number/id6476119232)

Tap and locate the target number within a grid before the timer expires. As you progress, the puzzles become more complex with additional digits, colors, and shapes. Challenge your mind and strive for the highest Brain Score.

**Highlights:** Tap and find target numbers, Time-based challenges, Increasing difficulty with digits, colors, shapes, Brain Score system, Addictive gameplay

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

**In-app purchases:** none


### Serial 7s

[App page](https://appshunter.io/ios/app/serial-7s/id6480178276)

This game challenges you to rapidly subtract 7 from a starting number until you can no longer continue. It's based on a cognitive test used to assess attention and memory, with consistent play potentially improving brain skills and helping to prevent cognitive decline.

**Highlights:** Serial 7 subtraction gameplay, Tests attention and memory, Helps prevent cognitive decline, Measures subtraction speed, Randomized starting numbers

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

**In-app purchases:** none


## Frequently asked questions

### Is Find Number! free?

Find Number! is free to download, with no in-app purchases.

### Is Serial 7s free?

Serial 7s is free to download, with no in-app purchases.

### Do Find Number! or Serial 7s have ads?

Both Find Number! and Serial 7s show ads.

### Which is updated more often, Find Number! or Serial 7s?

Find Number! ships an update every 20 months, and Serial 7s every 5 months. Most recently, Find Number! was updated on October 12, 2026 and Serial 7s on October 12, 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.*