Rechenflow Mental Math

Practice mental math every day in short rounds: Rechenflow is your mental arithmetic trainer for addition, subtraction, times tables, division, percentages and squares. Ten questions a day, a sprint against the clock, or practice that adapts to your level. No ads, no subscription.

HOW MENTAL MATH WORKS IN RECHENFLOW
You see a question like 8 × 9 and pick the right answer. You see right away what is correct, and the next question follows. Questions range from small times tables to three-digit numbers across nine difficulty levels. In practice mode the level goes up after three correct answers in a row and down after two mistakes, so it is never too easy or too hard.

INCLUDED FROM THE START
• Daily challenge with ten questions and one attempt per day
• Addition practice with freshly generated questions
• Statistics and history

UNLOCK COMPLETE ONCE
• Subtraction, multiplication, division, percentages and squares
• Sprint: how many questions can you solve in 60 seconds?
• Estimation tasks and harder pro levels
• Daily pro challenge and one streak joker per month

ALL MODES AT A GLANCE
• Daily challenge: ten questions, one attempt per day
• Daily pro challenge: higher levels with bigger numbers
• Practice: 15 questions per round, difficulty adapts
• Sprint: a 60-second high score and a weekly leaderboard
• Estimate: true or false, order of magnitude, which is closer, missing operator
• Pro: higher level, bigger numbers
• Relaxed: no timer and no streak, your choice

STREAK, STATISTICS, PROGRESS
Practice daily to build a streak. With Complete, one streak joker per month bridges a missed day. Statistics show for each operation how many questions you answered, how many were right and how fast you were, so you can see where you are confident and where practice pays off.

WHO IS RECHENFLOW FOR?
Anyone who wants to practice arithmetic without a calculator: adults who want to keep percentages, estimates and times tables sharp, teenagers before exams, and anyone who likes a small daily math break. Short rounds fit into any pause.

YOUR PACE, YOUR STYLE
Fit in a short round or stay for a longer practice session. Choose light mode, dark mode or your system setting. Available in English, German, French, Spanish, Italian and Brazilian Portuguese.

TIPS FOR FASTER MENTAL MATH
Split numbers into easy parts: 48 + 37 is 48 + 30 + 7. Multiply by 5 as half of times 10: 5 × 46 is 460 ÷ 2 = 230. Ten percent is a tenth, so 15 % of 80 is 8 plus half of 8, which is 12. For 9 × 7, think 10 × 7 minus 7. Estimation questions train exactly this sense for size, and the statistics show which operation still costs you time.

A DAY WITH RECHENFLOW
In the morning, the daily challenge: ten questions, one attempt. At lunch, a 60-second sprint to chase your best score. In the evening, a relaxed round without timer or streak. Five minutes are enough, and the streak shows how often you kept it up.

No ads. No subscription. No cloud account is needed to play or buy. Local rounds work offline; verified online results, purchases, restores and optional cloud backup require a connection.