Comparison

Scan2PDF Mobile vs Memorize Pi Digits

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Scan2PDF Mobile

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
Read full description

Scan2PDF Mobile is the simplest, fastest document scanner and uses your device camera to scan paper documents and convert them into PDFs. Features include: - Simple scanning: scan multiple pages in one single session. Scan2PDF Mobile will automatically recognise pages and scan them automatically! - Folder storage: organise your PDFs into folders with a simple folder system. This means you can store all your scanned PDFs in their logical places - eg bills, passports, letters etc. - iCloud sync: your PDFs can be automatically synced with your iCloud drive meaning you can access them elsewhere as well as providing a secure automated backup. - PDF encryption: protect your PDFs by adding a password when you create them. - Append: you can append pages to an existing PDF, useful for keeping all monthly bills in a single PDF by appending pages as each bill comes in. - Share: share your PDFs using the standard iOS share facility - you can print, email or save elsewhere. Scan2PDF Mobile is fully functional and free with ads or you can remove the ads by subscribing. View our terms and conditions at https://scan2pdf.com/eula and our privacy policy at https://scan2pdf.com/privacy

About

Memorize Pi Digits

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
Read full description

Pi is constant, it is represented by the Greek letter π. The numerical value of π is 3.1415926....... Pi is infinite series irrational number. From wikipedia: Piphilology is the practice of memorizing large numbers of digits of π, and world-records are kept by the Guinness World Records. The record for memorizing digits of π, certified by Guinness World Records, is 70,000 digits, recited in India by Rajveer Meena in 9 hours and 27 minutes on 21 March 2015. This app is a tool to help you memorize pi digits, we offer first 1 million (1000000) Pi digit. It is the only tools your need to learn Pi. If you want to learn Pi ( π ), it should be the best Pi trainer software. You can learn Pi from 101 to Guinness World Records holder. This game is a very good educational game, learn it day by day. Some days later you will memory a lot of Pi Digit. Many users report that this app can help them to remember pi number, they can't believe that they can remember few hundred digits. But it is real. Every year March 14th is Pi day, to Celebrate Pi Day you can try to remember the first 100 digits. Using our app, you can do it in few hours. The UI design of this game is dark mode, it is the most modern app UI design. You can see the new coming OS also add dark mode theme. Add network competition mode, if all the devices are connected same local area network. You can create a network competition up to 5 people play on same time. FB : https://www.facebook.com/Pi-314-342764079883765/

Screenshots

Scan2PDF Mobile4 screens
Memorize Pi Digits4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Scan2PDF Mobile versus Memorize Pi Digits: the parameters behind the verdict, then further details
ParameterScan2PDF MobileMemorize Pi Digits
PriceFreeFree
Rating5.0 (4 ratings) — better4.4 (152 ratings)
Positive reviews48.0% of reviews74.4% of reviews — better
Number of ratings4152 — better
Update frequencyWeekly — betterEvery 5 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.4 — better16.6
Further details — not scored
Size24 MB103 MB
Age rating4+4+
DeveloperBurrotechOscar Tsang

Customer experience

Scan2PDF Mobile

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews25 reviews
Positive48.0%
Neutral12.0%
Negative40.0%

Memorize Pi Digits

All ratings152 ratings
Positive84.9%
Neutral5.3%
Negative9.9%
Written reviews43 reviews
Positive74.4%
Neutral4.7%
Negative20.9%

In-app purchases

2 purchases

Scan2PDF Mobile

Subscriptions2
  • Monthly subscription7 Days trial$0.991 Month
  • Annual subscription7 Days trial$9.991 Year
1 purchases

Memorize Pi Digits

One-time1
  • Remove AD$1.99

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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