Comparison

drillio vs Monte Forest

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

Head to head
About

drillio

Enhance your calculation abilities with engaging mental math exercises. This app offers customizable practice cards for addition, subtraction, multiplication, and division, along with progress tracking to keep you motivated.

Highlights
  • Mental math cards for calculation techniques
  • Customizable practice modes
  • Progress tracking via stats tab
  • Engaging brain-boosting exercises
  • Covers addition, subtraction, multiplication, division
Features
Read full description

drillio helps you build real mental math skills with soroban-style flash anzan and arithmetic drills. 41 flash anzan levels (from beginner to 20th dan) and 278 arithmetic lessons. All core learning is free. FLASH ANZAN - 41 levels: beginner, 20th kyu to 1st kyu, then 1st to 20th dan - Master a level by answering correctly 10 times, and earn a certificate - Frame-accurate display timing, so even the fastest flashes are shown precisely - Custom mode: choose your own digits, number of terms and display time - Your fastest answer is saved automatically ARITHMETIC DRILLS - 278 lessons in addition, subtraction, multiplication and division, from basic to advanced - 2-digit x 2-digit, 3-digit problems, fill-in-the-blank problems and more - Earn more points the faster you answer, and see your progress for each lesson CHALLENGES - Time Attack: solve as many problems as you can before time runs out - Oni Calc: answer the problem from N steps back, training memory and calculation together KEEP GOING - Daily streaks, study time and points - Reminders before your streak ends drillio PRO (optional) - No ads - Dark mode - Streak recovery - Priority support Subscriptions renew automatically unless cancelled. Terms of Use: https://gist.github.com/aviciida/c635fb7d61c24c8df4f39506902f3ca6 Privacy Policy: https://gist.github.com/aviciida/f9dd03234fa3de0b23aa536073abcca4

About

Monte Forest

Features
Read full description

No Ads! No In-App Purchases! Completely Free! A safe learning app you can hand to your child with confidence -------------------- What is "Monte Forest"? -------------------- Learn numbers 1-10 with adorable animal friends through play! Based on authentic Montessori teaching materials, redesigned as an app. Through "seeing," "touching," and "thinking," number sense develops naturally. -------------------- Perfect for children who... -------------------- - Are starting to show interest in numbers - Want to learn numbers 1-10 - Want to practice writing numerals - Can't stop saying "More!" and "Again!" -------------------- 6 Fun Number Activities -------------------- [Number Rods] Arrange rods by length and feel the size of numbers! See that "1 is short, 10 is long" at a glance. [Trace Numbers] Trace numerals with your finger to learn their shapes! Correct stroke order comes naturally. [Count and Sort] Count carrots and put them in boxes! Practice counting aloud: "1, 2, 3..." [Cards and Counters] Place counters to match the number on each card! Discover odd and even numbers through play. [Compare] Which is more? What is the difference? Learn greater and less than through comparison. [Number Matching] Find pairs of numbers and dots! A memory game that boosts recall while having fun. -------------------- For Parents -------------------- [Safety Features] - No advertisements whatsoever - No purchases or subscriptions - Works completely offline - Parent lock prevents accidental changes [What is Montessori Education?] An approach that values the joy of "I did it myself!" It respects each child's pace and draws out learning through play. [Ages] 3-6 years [Languages] Japanese and English -------------------- We support your child's discovery that "Numbers are fun!" Let's head to the Forest Plaza with our animal friends!

Screenshots

drillio4 screens
Monte Forest4 screens

Verdict

The call

The clearest difference is price: drillio at Free against Monte Forest's $0.99. drillio also leads on update cadence (every 2 weeks vs every 3 months). Monte Forest's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement 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

drillio is free to download; Monte Forest costs $0.99 up front. drillio sells 3 in-app purchases, starting at $1.99 per month. Monte Forest asks for nothing beyond the download.

UpkeepUpdate frequency

drillio ships an update every 2 weeks, Monte Forest every 3 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
drillio versus Monte Forest: the parameters behind the verdict, then further details
ParameterdrillioMonte Forest
PriceFree — better$0.99
Rating4.5 (8 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.016.0
Further details — not scored
Size33 MB2 MB
Age rating4+4+
DeveloperRyo Iidadaijiro makabe

In-app purchases

3 purchases

drillio

Subscriptions3
  • drillio PRO Monthly$1.991 Month
  • drillio PRO campaign1 Year trial$14.991 Year
  • drillio PRO Annual$14.991 Year
None

Monte Forest

No in-app purchases

Questions

Is drillio free?
drillio is free to download, with in-app purchases available.
Is Monte Forest free?
Monte Forest costs $0.99, with no in-app purchases.
Do drillio or Monte Forest have ads?
drillio shows ads; Monte Forest does not.
Which is updated more often, drillio or Monte Forest?
drillio ships an update every 2 weeks, and Monte Forest every 3 months. Most recently, drillio was updated on October 30, 2026 and Monte Forest on October 31, 2026.

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