Comparison

CodeBrew for Schools vs Mental Math

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

Head to head
About

CodeBrew for Schools

Features
Read full description

Introducing CodeBrew for Schools: Your Java IDE for the classroom iPad! CodeBrew brings the power of Java programming to your iPads, making it easier than ever to teach and learn coding in schools. CodeBrew is a simple, effective tool for building real-world programming skills. Code in Java 17, Anytime, Anywhere CodeBrew runs Java 17 directly on iPads—no internet required. This offline capability ensures uninterrupted coding sessions, perfect for classrooms, homework assignments, or coding clubs. Teach Creativity with Game Development CodeBrew’s custom graphics framework lets students experiment with coding and create simple games. It’s an engaging way to introduce programming concepts and spark creativity in the classroom. Jumpstart Learning with Example Projects CodeBrew includes a collection of example projects, offering a practical starting point for students of all skill levels. These examples are designed to make programming approachable and relatable. Java is a registered trademark of Oracle and/or its affiliates The Terms of Service apply: https://astrobeats.net/tos.html

About

Mental Math

Sharpen your mental math skills with daily practice. This app uses spaced repetition to help you master concepts like fractions, percentages, and algebra. It offers two modes for flexible learning and provides real-life examples of how math is used every day.

Highlights
  • Spaced repetition system (SRS)
  • Covers multiplication, division, fractions, percentages, algebra
  • Zen and Chrono practice modes
  • Visible progress tracking
  • Real-life math examples
  • Home screen widgets
  • Customizable reminders
Features
Read full description

10 minutes a day to keep your mental math sharp. Whether you're in middle school, in high school, or an adult who wants to reconnect with math, Kalc helps you forge solid mental reflexes, without cramming. Spaced repetition system (SRS): concepts you master space out over time, the ones you miss come back the next day. The method known to deliver the most learning per minute practiced. WHO IT'S FOR · UK students (Year 7-10), US students (Grade 6-9) · Other English-speaking systems (Canada, Australia, Ireland, NZ) · Spanish-speaking students (Spain ESO, Mexico secundaria/preparatoria) · French-speaking students (France, Belgium, Switzerland, Quebec) · Adults who want to get back fluency with mental math Each user picks their school system during onboarding. Content and examples adapt. WHAT KALC COVERS · Multiplication and division (times tables, decimals, signed) · Fractions (simplification, operations, fraction of a whole) · Percentages (calculation, increase, discount, compound change) · Powers and square roots · Algebra and order of operations · Addition and subtraction of signed integers TWO PRACTICE MODES · Zen mode: at your own pace, no pressure, to consolidate the basics · Chrono mode: against the clock, to build speed under exam conditions VISIBLE PROGRESS Every skill has its own level and progress bar. You see exactly where you stand and what's left to master. IN REAL LIFE Every session ends with a concrete example of how this skill serves you day to day: splitting a restaurant tab, reading a paycheck, working out a discount, planning a budget. Mental math is something you actually use. HOME SCREEN WIDGETS Track your progress straight from your iOS home screen, without opening the app. Streak, XP and skills in progress at a glance. MEASURED REMINDERS Up to 5 reminders over the first 3 weeks, off at any time. No spam, no guilt-tripping. ONE-TIME PURCHASE, NO SUBSCRIPTION Kalc is free to download (1 skill available without purchase). Full access unlocks with a single purchase (lifetime or 1 year non-renewing). No traps, no hidden paywall. PRIVACY All your data stays on your device and syncs through your personal iCloud account. No ads, no advertising tracking, no cookies. Kalc is for people who want real progress in mental math. Privacy policy: https://lmtdigitalcreations.com/kalc/privacy.html Terms of use: https://lmtdigitalcreations.com/kalc/terms.html

Screenshots

CodeBrew for Schools4 screens
Mental Math4 screens

Verdict

The call

The clearest difference is price: Mental Math at Free against CodeBrew for Schools's $24.99. Mental Math also leads on update cadence (fortnightly vs every 2 months). CodeBrew for Schools's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.6). On 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

Mental Math is free to download; CodeBrew for Schools costs $24.99 up front. Mental Math sells 2 one-off in-app purchases. CodeBrew for Schools asks for nothing beyond the download.

UpkeepUpdate frequency

CodeBrew for Schools ships an update every 2 months, Mental Math fortnightly. The most recent releases landed on September 15, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 5 level
CodeBrew for Schools versus Mental Math: the parameters behind the verdict, then further details
ParameterCodeBrew for SchoolsMental Math
Price$24.99Free — better
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size326 MB17 MB
Age rating4+4+
DeveloperJulius NaeumannLMT Digital Creations

In-app purchases

None

CodeBrew for Schools

No in-app purchases

2 purchases

Mental Math

One-time2
  • Plan Annuel$17.99
  • Accès à vie$29.99

Questions

Is CodeBrew for Schools free?
CodeBrew for Schools costs $24.99, with no in-app purchases.
Is Mental Math free?
Mental Math is free to download, with in-app purchases available.
Do CodeBrew for Schools or Mental Math have ads?
Neither CodeBrew for Schools nor Mental Math shows ads.
Which is updated more often, CodeBrew for Schools or Mental Math?
CodeBrew for Schools ships an update every 2 months, and Mental Math fortnightly. Most recently, CodeBrew for Schools was updated on September 15, 2026 and Mental Math on September 26, 2026.

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