11x13 vs Numerlo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
11x13
This app offers daily math practice to improve number familiarity and overcome math reservations. It focuses on basic arithmetic operations with visual progress tracking through charts and grids. Daily practice sessions can enhance fundamental mathematical skills.
- Daily math practice
- Basic arithmetic operations
- Progress visualization
- Personalized calculation levels
- Leaderboard integration
- Number range grids
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A short problem, nine answers, one correct — 11x13 trains mental math with no clutter and no words in the problems. THE BASIC OPERATIONS ARE FREE. NOW AND FOREVER. Addition, subtraction, multiplication and division with level bands that grow with you: from small times tables over carrying to the 11–19 tables — the app's namesake — plus chained problems like 47 + 8 + 6 at high levels. WITH “EVERYTHING” YOU PRACTICE EVERY OPERATION. One single purchase unlocks everything permanently — try it free for 14 days: • Percentages: from 50% of round numbers to surcharge and discount • Roots: squares and cube roots • Powers: up to powers of two and ten • Derivatives and integrals: from monomials to binomials • Geometry: symbol equations (▲ + ▲ = 12), counting corners, matching shapes Your progress grows per operation, syncs via iCloud, with progress charts and a Game Center leaderboard. Now with a true iPad layout and hardware keyboard support (keys 1–9).
Numerlo
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People notice fast thinkers. Complete a 60-second mental math sprint. Track your progress with the Numerlo Index. Watch your speed and accuracy improve over time. Short. Focused. Habit-forming. Free version includes • 8 daily games + 2 challenger games • Numerlo Index progress tracking • No ads - ever Premium unlocks • Unlimited daily games • Unlimited practice mode • Professional Challenges Built for people who used to be “math people” Accountants. Engineers. Finance. Consulting. Medicine. Anyone who wants sharper thinking in a world of calculators. Privacy first No tracking. No ads. Your data stays on your device. You can’t fake mental math. Build the advantage. Privacy: https://numerlo.app/docs/privacy.html Terms: https://numerlo.app/docs/terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: 11x13 at none against Numerlo's 2. Numerlo's advantage is update cadence (every 3 days vs every 48 months). On price, ads, 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
Both are free to download. Numerlo sells 2 in-app purchases, starting at $2.99 per month. 11x13 asks for nothing beyond the download.
11x13 ships an update every 48 months, Numerlo every 3 days. Both last shipped on September 10, 2026.
| Parameter | 11x13 | Numerlo |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 48 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 2 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Hennemeyer | Nanxi Li |
In-app purchases
11x13
No in-app purchases
Numerlo
- Monthly Premium7 Days trial$2.991 Month
- Annual Premium7 Days trial$25.991 Year
