# Remember 3.1415 vs Perspectrip

The clearest difference is update cadence: Perspectrip at every 31 months against Remember 3.1415's every 64 months. Remember 3.1415's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Remember 3.1415 sells 1 one-off in-app purchase and Perspectrip sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Remember 3.1415 ships an update every 64 months, Perspectrip every 31 months. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Remember 3.1415 | Perspectrip |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/remember-31415/id985688958/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 64 months | **Every 31 months** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 96 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [杨军 朱](https://appshunter.io/developer/564474259) | [baKno Games](https://appshunter.io/developer/295881975) |

## 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 |


### Perspectrip

[App page](https://appshunter.io/ios/app/perspectrip/id1116095679)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Perspectrip 10 Game Sessions. | $0.99 | one-time |
| Perspectrip Full Game Unlimited | $24.99 | one-time |


## Frequently asked questions

### Is Remember 3.1415 free?

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

### Is Perspectrip free?

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

### Do Remember 3.1415 or Perspectrip have ads?

Neither Remember 3.1415 nor Perspectrip shows ads.

### Which is updated more often, Remember 3.1415 or Perspectrip?

Remember 3.1415 ships an update every 64 months, and Perspectrip every 31 months. Most recently, Remember 3.1415 was updated on October 3, 2026 and Perspectrip on October 4, 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.*