RedoCalc vs Chain Calculator
Price, ratings, monetisation and update history for both apps, side by side โ 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 ร.) If you tap โ=โ, 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.
Chain Calculator
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[Key Features] - Edit & Auto-Update : Modify any past value and watch all connected results update in real-time. - Save History : Save your frequently used formulas to your favorites and reuse them whenever you need. - Dark Mode Support : Enjoy a sleek, eye-friendly dark mode that adapts to your system settings. - Ad-Free Experience : Enjoy a clean, distraction-free environment with absolutely no ads.
Screenshots
Verdict
The clearest difference is ads: Chain Calculator at none against RedoCalc's shown. Chain Calculator also leads on iOS requirement (13.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs monthly). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท 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, Chain Calculator monthly. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.
| Parameter | RedoCalc | Chain Calculator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days โ better | Monthly |
| Ads | Yes | No โ better |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPod โ better |
| Requires iOS | 18.0 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 3 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Toshiyuki Kuwabara | seongkuk park |
In-app purchases
RedoCalc
No in-app purchases
Chain Calculator
No in-app purchases
Questions
Is RedoCalc free?
Is Chain Calculator free?
Do RedoCalc or Chain Calculator have ads?
Which is updated more often, RedoCalc or Chain Calculator?
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