Keisan Memo — Calc Notepad
Notes that do the math
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Stop bouncing between a calculator and your notes.
Keisan Memo is a text calculator. Write “lunch 1,200 × 3” in a note and “3,600” appears at the end of the line as you type. Edit the numbers and every result updates.
- NATURAL WRITING: labels and math share the same line.
- JAPANESE-NATIVE: supports Japanese numerals, consumption tax phrases, and percentage discounts.
- TOTALS & VARIABLES: write 合計 to sum previous lines or define reusable values.
- UNIT CONVERSION: convert length, weight, and time inline.
- EXACT DECIMAL MATH: 0.1 + 0.2 is exactly 0.3.
- FREE AND UNLIMITED: notes, lines, templates, and text/CSV export have no paywall.
- ON-DEVICE NOTES: calculations and note storage stay on the device. Note contents are not sent to the advertising provider.
The free app displays one adaptive banner at the bottom. A ¥100 / $0.99 non-consumable purchase permanently removes the banner. It is a one-time purchase with no subscription and no automatic renewal. Ad delivery uses Google AdMob and an internet connection; advertising identifier use follows your iOS tracking permission.
Note: results are estimates for personal memos and are not accounting, tax, or legal advice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Fixed an ad privacy setting so ads display correctly.
The developer, 丽佳 施, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 丽佳 施
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads (Lifetime) $0.99
- Copyright
- © 2026 Lijia Shi