Supported Features
-
VoiceOver
-
Larger Text
-
Dark Interface
-
Differentiate Without Color Alone
-
Reduced Motion
Rhythmetic Calculator
Tip, Loan & Salary Math
Free · In‑App Purchases
The calculator you'll open every day. Free finance, scientific mode, tape, radio and sampler. Pro adds VA, Roth IRA, retirement, custom stations, recording and iCloud.
Rhythmetic is free. The everyday calculator you'll actually keep on your home screen — with finance depth most calculators don't have.
FREE, FOREVER
Basic and scientific modes with a formula bar you can type into. Tape history so you can see your work. Tip splitting, currency conversion, and three finance calculators — loan, interest, and salary. Curated internet radio while you work. A nine-pad soundboard.
PRO — ONE PURCHASE, NO SUBSCRIPTION
All 10 finance calculators: home affordability, VA loan and funding fee, auto, 401k, Roth IRA limits, Social Security timing, and wealth scenarios — with saved history. The full 27-pad sampler across three banks, with mic recording, echo, reverb, flanger and 5-band EQ. Add any radio station by URL. iCloud sync across your devices.
TRY IT FIRST
Start a 7-day preview of Pro. No payment, no card. When it ends, Pro features lock — but nothing is deleted. Your samples, stations, settings and history stay exactly where you left them.
ALREADY BOUGHT RHYTHMETIC?
Pro is yours automatically. Tap Restore Purchases.
BUILT FOR ACCURACY
Version 3.0 corrects VA funding fee, Roth IRA contribution limits, and Social Security retirement calculations against current federal guidance.
PRIVATE BY DEFAULT
Calculations stay on your device. Analytics are opt-in, anonymous, and off unless you turn them on.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Polish and fixes:
• The Finance tab no longer pops up the number keypad on its own
• Repeated equals now shows every step on the tape
• Full-height tape on iPhone, with no text overlap
• Quieter equals chime, plus a setting to turn it off
• Clearer free-preview banner with a countdown and Unlock Early option
• Bigger tap targets throughout
• TomorrowGuild logo restored in About
The developer, Tomorrow Source, LLC, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
For more information, visit the developer’s accessibility website .
Information
- Seller
- TOMORROW SOURCE LLC
- Size
- 20.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 15.6 or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Rhythmetic Pro $3.99
- Copyright
- © 2026. Tomorrow Guild LLC
