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Comparison

PiMemory vs π Pi Challenge

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

Head to head
PiMemory
PiMemory

Fun π Memory & Learning App

Free
📚 Education
No ratingsView app →
π Pi Challenge
π Pi Challenge

Master the digits of Pi

Free
📚 Education
No ratingsView app →
About

PiMemory

Features
Read full description

PiMemory is a fun app to learn and memorize the digits of π. In Game Mode, you can enter numbers to challenge yourself and set high scores up to 3,000 decimal places. In Learn Mode, you can view and practice π up to 3,000 decimal places repeatedly. Key Features: - Game Mode: Challenge yourself by matching π digits using the numeric keypad (up to 3,000 decimal places) - Learn Mode: Check and practice π digits as far as you want (up to 3,000 decimal places) - High Score Management: Save and update your personal records - Intuitive UI: Optimized design for both iPhone and iPad - Ads: Banner ads for free use (privacy-compliant) Have fun memorizing π with PiMemory while improving your focus and memory skills!

About

π Pi Challenge

Features
Read full description

An app for memorizing the digits of Pi. It supports up to 30 million digits… totally unnecessary, but fun. Comes with a ranking feature! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PiMemory4 screens
π Pi Challenge2 screens

Verdict

The call

The clearest difference is in-app purchases: PiMemory at none against π Pi Challenge's 1. PiMemory also leads on update cadence (fortnightly vs every 2 months). π Pi Challenge's advantage is iOS requirement (13.0 vs 16.6). On price, ads and device support 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. π Pi Challenge sells 1 in-app purchase, starting at $0.99 per month. PiMemory asks for nothing beyond the download.

UpkeepUpdate frequency

PiMemory ships an update fortnightly, π Pi Challenge every 2 months. The most recent releases landed on March 19, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 3 level
PiMemory versus π Pi Challenge: the parameters behind the verdict, then further details
ParameterPiMemoryπ Pi Challenge
PriceFreeFree
Update frequencyFortnightly — betterEvery 2 months
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size11 MB73 MB
Age rating4+4+
DeveloperYounghan KimSIC Company Limited

In-app purchases

None

PiMemory

No in-app purchases

1 purchases

π Pi Challenge

Subscriptions1
  • Monthly Subscription$0.991 Month

Questions

Is PiMemory free?
PiMemory is free to download, with no in-app purchases.
Is π Pi Challenge free?
π Pi Challenge is free to download, with in-app purchases available.
Do PiMemory or π Pi Challenge have ads?
Both PiMemory and π Pi Challenge show ads.
Which is updated more often, PiMemory or π Pi Challenge?
PiMemory ships an update fortnightly, and π Pi Challenge every 2 months. Most recently, PiMemory was updated on March 19, 2026 and π Pi Challenge on September 18, 2026.

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