Accrue - Compounding Interest
Compound interest, per day
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Accrue is a compound interest calculator for a strategy quoted per trading day.
Enter the gain you are aiming for each market day — 0.300% — and Accrue compounds it over the 252 days a year the market is open, then says what that comes to in the terms everyone else uses: APR, APY, and the same rate read on a calendar basis.
It is one screen. Every input is a field you edit with the chart in view, and the answer moves as you type.
FEATURES
• The daily rate is the input, not an annual figure divided down
• 252 market days or 365 calendar days, switchable — and it shows what your rate is on the other one
• Contributions daily, weekly or monthly
• Term in days, months or years
• The chart's time scale is an input too: read the same projection in days, weeks, months, quarters or years
• Drag along the curve to read any point out
• A breakdown table that unfolds underneath, at whatever scale you chose
• Opens on whatever you left in it
• Light and dark, or follow your iPhone
WHY THE DAY COUNT MATTERS
A gain earned per trading day compounds about 252 times a year, not 365. At 0.300% a day that is 112.73% APY on a market basis against 198.43% on a calendar one — the same number, read two ways, and the difference only means something because the daily rate is what you typed.
NOT A FORECAST
Accrue projects one scenario: the rate you enter, held every single day. No strategy does that, and the app makes no claim that any rate is achievable. It is a tool for seeing what compounding does.
No account, no network, no tracking. Every feature is free; the optional tips in Settings unlock nothing.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Rouse Experiments, 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
- Alexander Rouse
- Size
- 4.2 MB
- Category
- Finance
- Compatibility
Requires iOS 18.5 or later.
- iPhone
Requires iOS 18.5 or later. - Mac
Requires macOS 15.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.5 or later.
- iPhone
- Languages
English and 2 more
- English, French, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Coffee $2.99
- Copyright
- © 2026 Alex Rouse