# Scan2PDF Mobile vs Memorize Pi Digits

The clearest difference is rating: Scan2PDF Mobile at 5.0 against Memorize Pi Digits's 4.4. Scan2PDF Mobile also leads on update cadence (weekly vs every 5 months) and iOS requirement (12.4 vs 16.6). Memorize Pi Digits's advantage is review sentiment (74% vs 48%) and ratings volume (152 vs 4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Scan2PDF Mobile sells 2 in-app purchases, starting at $0.99 per month and Memorize Pi Digits sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scan2PDF Mobile holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Memorize Pi Digits has 152 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 48% of Scan2PDF Mobile's written reviews are positive against 74% of Memorize Pi Digits's, so the app with the better star average is not the one people write more warmly about.

Scan2PDF Mobile ships an update weekly, Memorize Pi Digits every 5 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Scan2PDF Mobile | Memorize Pi Digits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/scan2pdf-mobile/id325424047/reviews)** | [4.4 (152 ratings)](https://appshunter.io/ios/app/memorize-pi-digits-314/id1264340985/reviews) |
| Number of ratings | 4 | **152** |
| Positive reviews | 48.0% of reviews | **74.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 24 MB | 103 MB |
| Requires iOS | **12.4** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Burrotech](https://appshunter.io/developer/325424050) | [Oscar Tsang](https://appshunter.io/developer/416987065) |

## What reviewers say

### Scan2PDF Mobile

[App page](https://appshunter.io/ios/app/scan2pdf-mobile/id325424047)

Easily convert paper documents into PDFs using your device's camera. Organize scans into folders, sync with iCloud for backup, and protect sensitive files with password encryption. Share your documents via email, printing, or saving to other locations.

**Highlights:** Multi-page scanning, Automatic page recognition, Folder organization, iCloud sync and backup, PDF encryption, Append pages to existing PDFs, Share PDFs

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $0.99 | per month |
| Annual subscription | $9.99 | per year |


### Memorize Pi Digits

[App page](https://appshunter.io/ios/app/memorize-pi-digits-314/id1264340985)

This app helps you memorize digits of Pi, offering up to one million digits for practice. It features a dark mode interface and a network competition mode for up to five players. Ideal for educational purposes and memory improvement.

**Highlights:** Memorize up to 1 million Pi digits, Dark mode UI design, Network competition mode (up to 5 players), Educational game for memory improvement, Track progress day by day

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove AD | $1.99 | one-time |


## Frequently asked questions

### Is Scan2PDF Mobile free?

Scan2PDF Mobile is free to download, with in-app purchases available.

### Is Memorize Pi Digits free?

Memorize Pi Digits is free to download, with in-app purchases available.

### Which has better reviews, Scan2PDF Mobile or Memorize Pi Digits?

Scan2PDF Mobile is rated higher. Scan2PDF Mobile averages 5.0 out of 5 from 4 ratings, while Memorize Pi Digits averages 4.4 from 152 ratings.

### Do Scan2PDF Mobile or Memorize Pi Digits have ads?

Both Scan2PDF Mobile and Memorize Pi Digits show ads.

### Which is updated more often, Scan2PDF Mobile or Memorize Pi Digits?

Scan2PDF Mobile ships an update weekly, and Memorize Pi Digits every 5 months. Most recently, Scan2PDF Mobile was updated on October 23, 2026 and Memorize Pi Digits on October 24, 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.*