Stillvaro
Four digits of pi at a time
Free · Designed for iPad. Not verified for macOS.
Memorize the digits of π. Four digits at a time. Follow each glyph, connect the sequence, and explore Learning trends. Made for iPhone and iPad. Works offline.
Memorize the digits of π. Four digits at a time.
In Stillvaro, every group of four digits draws a glyph on a circular dial. Follow its shape, try the digits from memory, then connect them to the next group. Build a sequence through touch, repetition, and recall.
FOUR DIGITS. ONE GLYPH.
Start with 3141, including pi’s leading 3. Guide highlights the next digit as the shape forms. Switch to Memory to recall it yourself. Connect smaller groups into passages of eight and sixteen.
SEE WHAT NEEDS ANOTHER LOOK
Learning trends brings recall, guidance, and slips into focus. Compare saved snapshots, see how individual groups are going, and find the digit positions where you have made mistakes. Your practice has a history you can explore.
WATCH THE PATTERN UNFOLD
Let Watch draw the sequence for you. Choose your pace and repetitions, start from your current group or the beginning, and return to your saved practice whenever you are ready.
MAKE THE NEXT CONNECTION
Practice brings earlier groups back as you learn. Reviews respond to your recall, mistakes, and use of help. Explore pi in groups of four, eight, or sixteen, and choose where to practice.
STEP BACK AND SEE THE SPIRAL
Open the Memory Spiral to follow your journey or explore more of pi. Play the sequence, pause to pan and zoom, or fit the whole spiral into view.
SEE HOW FAR YOU GET
Take a memory test with no hints and no timer. Your uninterrupted score counts complete groups before the first mistake. Finish whenever you like and return to your saved practice place.
MORE ROOM ON IPAD
A native workspace brings the dial and sequence side by side when there is room. Rotate or resize one app window while keeping your entered digits in place. In wide landscape windows, choose whether the dial sits on the left or right.
A QUIET CHALLENGE, AT YOUR PACE
Tap a digit, or drag to it and pause. Undo your latest entry before the group is complete. Choose light or dark appearance and optional haptics. Your place and practice history save automatically on your device.
Works offline. No account, ads, subscriptions, or in-app purchases.
Designed for iPhone and iPad. Requires iOS 26 or iPadOS 26 or later.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Memorize the digits of π with Stillvaro 2.0.
• A native iPad workspace adapts to rotation and window size, with a choice of dial position in wide landscape windows.
• Practice four digits at a time, then connect their glyphs into passages of eight and sixteen.
• Move between Guide, Memory, and Watch on a redesigned circular dial.
• New Learning trends combines recall and guidance snapshots, a group-by-group view, and a map of where slips happen.
• Explore pi at three scales and choose where to practice while keeping a return to your saved place.
• The Memory Spiral now lets you switch between My journey and Explore π.
• Check your recall in a separate memory test, then return to practice.
• Refined motion, clearer feedback, and updated help make the next step easier to follow.
• Hold your latest entered digit to undo it before completing a group.
Designed for iPhone and iPad. Requires iOS 26 or iPadOS 26 or later. The Pi Day Home Screen widget has been retired.
The developer, Mark Olson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mark Olson
- Size
- 6.7 MB
- Category
- Education
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Mark Olson
