Abacus' brain Lite vs Pi 100 Challenge
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Abacus' brain Lite
This application helps users improve their mental calculation speed by simulating abacus use. It offers various levels of difficulty, progressing from single digits with longer time limits to faster calculations.
- Abacus simulation for mental calculation
- Sequential addition of numbers
- Adjustable difficulty levels
- Flash mental calculation practice
- Improve calculation speed
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The mental calculation speed rapidly becomes early by putting the abacus in the head. This software is an application program that sequentially adds ten figures that appear one after another, and becomes familiar with the abacus. The level of the sense from 1 digit and 3 seconds to 0.5 seconds is prepared in the Lite version. Where can you calculate? The mental calculation mode is prepared of course, and calculate with an abacus in the head, please. The flash mental calculation is not a dream.
Pi 100 Challenge
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Some people climb mountains, while others run marathons. You are challenging yourself to calculate Pi by hand. This app guides you through all the steps needed to compute Pi to 100 decimal places. Surprisingly enough, this doesn't require any complex math -- just basic addition, subtraction, multiplication and long division. Each page presents one problem to solve. Complete the problem, and move on to the next step. Take the Pi-100 Challenge, sharpen your mind, and calculate Pi. GameCenter integration allows you to track progress and achievements. Leaderboards allow you to race against your friends to see who can finish more digits, or solve for the digits faster.
Screenshots
Verdict
The clearest difference is price: Abacus' brain Lite at Free against Pi 100 Challenge's $0.99. Abacus' brain Lite also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (6.0 vs 17.0). On ads, in-app purchases 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
Abacus' brain Lite is free to download; Pi 100 Challenge costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Abacus' brain Lite ships an update every 9 days, Pi 100 Challenge every 3 weeks. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.
| Parameter | Abacus' brain Lite | Pi 100 Challenge |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 56.3% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 6.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | POPPO STUDIO | Ram Rao |
In-app purchases
Abacus' brain Lite
No in-app purchases
Pi 100 Challenge
No in-app purchases
Questions
Is Abacus' brain Lite free?
Is Pi 100 Challenge free?
Do Abacus' brain Lite or Pi 100 Challenge have ads?
Which is updated more often, Abacus' brain Lite or Pi 100 Challenge?
Other comparisons
