# Learn Pi By Karina vs 3.14 Master Pi

The clearest difference is in-app purchases: Learn Pi By Karina at none against 3.14 Master Pi's 5. Learn Pi By Karina also leads on iOS requirement (11.4 vs 15.1). 3.14 Master Pi's advantage is update cadence (every 2 months vs every 25 months). On price, ads and device support there is nothing between them.

Both are free to download. 3.14 Master Pi sells 5 one-off in-app purchases. Learn Pi By Karina asks for nothing beyond the download.

Learn Pi By Karina ships an update every 25 months, 3.14 Master Pi every 2 months. The most recent releases landed on November 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Learn Pi By Karina | 3.14 Master Pi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/learn-pi-by-karina/id1219552192/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 1 MB | 47 MB |
| Requires iOS | **11.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sanjay Grover MD, FACS](https://appshunter.io/developer/508941289) | [David Brown](https://appshunter.io/developer/1848509879) |

## What reviewers say

### Learn Pi By Karina

[App page](https://appshunter.io/ios/app/learn-pi-by-karina/id1219552192)

This app helps users memorize the digits of Pi by breaking them into smaller, manageable groups. It's inspired by a method used to prepare for Pi Day contests, making memorization more accessible. Features include a testing mode with a scoreboard to track progress.

**Highlights:** Breaks Pi digits into smaller groups, Inspired by contest preparation methods, Supports memorization of up to 10,000 digits, Testing mode with elapsed time scoreboard, Track typing speed for Pi digits

**In-app purchases:** none


### 3.14 Master Pi

[App page](https://appshunter.io/ios/app/314-master-pi/id6754499094)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summation Supporter | $2.99 | one-time |
| Premium (Lifetime) | $4.99 | one-time |
| Radical Patron | $9.99 | one-time |
| Infinite Supporter | $29.99 | one-time |
| Pi Master | $99.99 | one-time |


## Frequently asked questions

### Is Learn Pi By Karina free?

Learn Pi By Karina is free to download, with no in-app purchases.

### Is 3.14 Master Pi free?

3.14 Master Pi is free to download, with in-app purchases available.

### Do Learn Pi By Karina or 3.14 Master Pi have ads?

Neither Learn Pi By Karina nor 3.14 Master Pi shows ads.

### Which is updated more often, Learn Pi By Karina or 3.14 Master Pi?

Learn Pi By Karina ships an update every 25 months, and 3.14 Master Pi every 2 months. Most recently, Learn Pi By Karina was updated on November 2, 2026 and 3.14 Master Pi on October 28, 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.*