# Remember 3.1415 vs Calcudoku (Puzzle)

The clearest difference is in-app purchases: Calcudoku (Puzzle) at none against Remember 3.1415's 1. Calcudoku (Puzzle) also leads on update cadence (every 4 weeks vs every 64 months). Remember 3.1415's advantage is ads (none vs shown) and ratings volume (4 vs 1). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Remember 3.1415 sells 1 one-off in-app purchase. Calcudoku (Puzzle) asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.0 for Remember 3.1415 against 4.0 for Calcudoku (Puzzle). Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Remember 3.1415 ships an update every 64 months, Calcudoku (Puzzle) every 4 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Remember 3.1415 | Calcudoku (Puzzle) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/remember-31415/id985688958/reviews) | [4.0 (1 ratings)](https://appshunter.io/ios/app/calcudoku-puzzle/id6760603843/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 64 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 10 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [杨军 朱](https://appshunter.io/developer/564474259) | [Aliaksandr Uvarau](https://appshunter.io/developer/960171474) |

## What reviewers say

### Remember 3.1415

[App page](https://appshunter.io/ios/app/remember-31415/id985688958)

Challenge your math and logic skills with this game that tests your ability to recall digits of Pi. Compete against the clock in various timed modes or an endless challenge. AI provides helpful tips to improve your input speed and accuracy.

**Highlights:** Over 1 million digits of Pi, Multiple timed game modes, Endless challenge mode, AI-powered input tips, Game over on time or error

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Pro Version | $0.99 | one-time |


### Calcudoku (Puzzle)

[App page](https://appshunter.io/ios/app/calcudoku-puzzle/id6760603843)

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

**In-app purchases:** none


## Frequently asked questions

### Is Remember 3.1415 free?

Remember 3.1415 is free to download, with in-app purchases available.

### Is Calcudoku (Puzzle) free?

Calcudoku (Puzzle) is free to download, with no in-app purchases.

### Which has better reviews, Remember 3.1415 or Calcudoku (Puzzle)?

Remember 3.1415 and Calcudoku (Puzzle) are both rated 4.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Remember 3.1415 or Calcudoku (Puzzle) have ads?

Calcudoku (Puzzle) shows ads; Remember 3.1415 does not.

### Which is updated more often, Remember 3.1415 or Calcudoku (Puzzle)?

Remember 3.1415 ships an update every 64 months, and Calcudoku (Puzzle) every 4 weeks. Most recently, Remember 3.1415 was updated on October 24, 2026 and Calcudoku (Puzzle) on October 25, 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.*