Carry the One: Mental Math
Lars Haneveld Education iPhoneiPadiPod touch
Carry the One: Mental Math is a free Education app for iPhone and iPad by Lars Haneveld. Requires iOS 17.0. Updated October 14, 2026.
- Price
- Free
- on the App Store
- Size
- 23 MB
- Age 4+
- Updated
- Oct 14
- 2026 · v1.1
Screenshots
About Carry the One: Mental Math
Carry the One trains the way you actually get faster at mental maths: one technique at a time, measured, and adapted to you. QUESTIONS MADE FRESH, NEVER MEMORISED There is no deck. Every question is generated, so the numbers change while the skill stays the same - the only way to know you have really learned it. IT MEASURES, IT DOESN'T ASK A short adaptive check finds your level from how you actually answer, including how long you take. No self-assessment, no picking a grade and hoping. 371 SKILLS ACROSS 12 PACKS Whole numbers, fractions, decimals, percentages, powers and roots, algebra, measurement, probability and more - sequenced so each one rests on the last. THE MISTAKE LAB Carry the One names the mistake behind your errors, not just which questions you got wrong. Train a named pattern and it tracks whether the fix actually held a day and three days later. MASTER CLASSES A class takes a single technique - splitting instead of carrying, say - and teaches it on purpose: the method first, then guided practice, then speed. THE BLITZ EXAM (Pro) Every other screen adapts to you, which is why none of them can grade you. The Blitz Exam gives that up on purpose: a fixed 20-question paper across everything you have practised, scored out of 100 - and kept, so a single number becomes a trend you can watch climb. CARRY THE ONE PRO The Blitz Exam, the Diagnosis (the one mistake behind most of your errors, across every topic), Review Sets with a goal and an exam date, full manual mode over all 371 skills, unlimited practice, and the advanced statistics. Free to use every day. Pro is a subscription; there is a free trial and you can cancel any time. Terms of Use (EULA): https://economic-rugby-9a9.notion.site/Alcor-Terms-of-Use-39ebe0b6b7cb81398bacdd28ab91c5db
What’s new
Version 1.1 · Updated October 14, 2026
Blitzcalc is now Carry the One. Same app, same developer, new name and icon. Your progress, streaks and subscription carry over untouched. Also in this update: • Smarter question selection in practice sessions • Fixes and polish throughout
App privacy
The developer, Lars Haneveld, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Carry the One: Mental Math
Looking for apps like Carry the One: Mental Math? Here are 6 similar apps on the App Store. The highest rated is Mathy — Mental Math Trainer (5.0/5), and all 6 are free to download.
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MathWiz: Mental Math
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Mathy — Mental Math Trainer
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Math Fractions Trainer by CS
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Schmerz- u. Palliativtage 2025
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Math Speed Booster: Fast Calc
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Simple Mental Math Practice
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Carry the One: Mental Math | – | Free | October 14, 2026 | |
| MathWiz: Mental Math | – | Free | Sep 29, 2026 | Compare |
| Mathy — Mental Math Trainer | 5.0 / 5 (1) | Free | Oct 20, 2026 | Compare |
| Math Fractions Trainer by CS | – | Free | Mar 23, 2026 | Compare |
| Schmerz- u. Palliativtage 2025 | – | Free | Mar 11, 2025 | Compare |
| Math Speed Booster: Fast Calc | – | Free | Aug 18, 2026 | Compare |
| Simple Mental Math Practice | – | Free | Jul 16, 2026 | Compare |