RedoCalc vs Memotto
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RedoCalc
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This is a calculator for people who only use it for simple calculations, such as adding up receipts or calculating the cost of a meal split between several people, but who are always worried about whether the input was correct. As it is a simple calculator, the only operations it can perform are - Four arithmetic operations (addition, subtraction, multiplication, division) - Percentage calculations (including calculations such as consumption tax using percentages) . The results are displayed as numbers with a digit symbol. There is no complicated exponential display. The calculation proceeds in the order of the keys you enter. There is no priority for multiplication or division. The formulas you enter are displayed in order in the upper area as a history. If you tap the white part, it will turn yellow and you will be able to modify that part. (You can modify not only numbers, but also arithmetic symbols such as + and ×.) If you tap “=”, the expressions from the first line to the last line will be recalculated. The result will be automatically copied, so you can switch to other apps and paste the value there.
Memotto
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I’ve created an incredibly simple memo app! While it’s minimal, it still includes essential features like widgets and dark mode. I focused on making it easy to use with one hand. Just launch the app, and you can start writing a memo right away! Use Cases ・When you need to take a quick note at work ・Shopping list ・Personal meeting notes at work ・When you come up with an idea ・Daily journaling Features of SuguMemo ・Supports both Japanese and English ・You can save images ・Memo search function ・Fully operable with one hand ・View memos by date ・Save photos taken with the camera Terms of Use https://sugumemo-ios.web.app/ Privacy Policy https://privacy-sugumemo-ios.web.app/
Screenshots
Verdict
The clearest difference is ads: Memotto at none against RedoCalc's shown. RedoCalc's advantage is update cadence (every 3 days vs every 6 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RedoCalc ships an update every 3 days, Memotto every 6 days. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.
| Parameter | RedoCalc | Memotto |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 6 days |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Toshiyuki Kuwabara | hidetaka okue |
In-app purchases
RedoCalc
No in-app purchases
Memotto
No in-app purchases









