# Memory Dog vs Pi Digits

The clearest difference is update cadence: Memory Dog at every 4 days against Pi Digits's monthly. Memory Dog also leads on iOS requirement (14.7 vs 17.0). On price, ads, 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.

Memory Dog ships an update every 4 days, Pi Digits monthly. The most recent releases landed on June 3, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Memory Dog | Pi Digits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pi-digits-memory-challenge/id6467522843/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | — | Free |
| Size | 3 MB | 11 MB |
| Requires iOS | **14.7** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Peter Grutter](https://appshunter.io/developer/1189899437) | [Slavka Polanova](https://appshunter.io/developer/1708764553) |

## What reviewers say

### Memory Dog

[App page](https://appshunter.io/ios/app/memory-dog/id1611138665)

**In-app purchases:** none


### Pi Digits

[App page](https://appshunter.io/ios/app/pi-digits-memory-challenge/id6467522843)

Test your ability to memorize and recall digits of Pi. Engage in fast-paced challenges to extend your streak and improve your number recall. Ideal for students, puzzle enthusiasts, or anyone seeking a quick mental workout.

**Highlights:** Memorize digits of Pi, Classic typing mode, Timed Blitz mode, Track best streaks, Quick brain workouts, Suitable for all levels

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is Memory Dog free?

Memory Dog is free to download, with no in-app purchases.

### Is Pi Digits free?

Pi Digits is free to download, with no in-app purchases.

### Do Memory Dog or Pi Digits have ads?

Neither Memory Dog nor Pi Digits shows ads.

### Which is updated more often, Memory Dog or Pi Digits?

Memory Dog ships an update every 4 days, and Pi Digits monthly. Most recently, Memory Dog was updated on June 3, 2026 and Pi Digits on September 3, 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.*