PiHeart: Memorize Pi Digits

Ever wanted to recite π far beyond 3.14? PiHeart turns memorizing famous mathematical constants into small, satisfying steps.

LEARN SIX FAMOUS SEQUENCES
• π (Pi): the ratio of a circle's circumference to its diameter
• e (Euler's number): the base of natural logarithms
• φ (Golden ratio): the divine proportion found throughout nature and art
• √2: the diagonal of a unit square
• ln 2: the natural logarithm of 2
• Prime numbers: the first 501 primes

Each constant comes with 1,000 digits, so there is always a next goal.

CHUNK BY CHUNK
Long digit strings are split into chunks of five, the size your working memory handles best. Learn a chunk, tick it off, move on. A minimap shows where you are in the sequence, and one tap jumps back to the farthest chunk you have learned.

MEMORY TECHNIQUES BUILT IN
Stuck? Open the hints for proven methods:
• Chunking: master one group of five before moving on
• Major System: turn digits into sounds and vivid words
• Method of Loci: place each chunk along a mental journey
• Spaced repetition: review at growing intervals until it sticks

SEE YOUR PROGRESS
The progress screen shows how much you have learned overall and for every sequence, so you can watch it grow, digit by digit.

FREE AND FOCUSED
• Free, supported by a small banner ad on the overview screens
• The learning screen is ad-free, so you can concentrate on the digits
• Learning works offline
• No account, no sign-up
• Your progress is stored only on your device

Whether you are preparing for Pi Day, training your memory, or just love numbers, PiHeart helps you learn them by heart.