Comparison

Calc+α vs RedoCalc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calc+α

This utility app simplifies daily calculations with an intuitive interface. It features a history of your calculations, allows for easy editing and recalculation, and provides convenient tax and division functions. Organize your finances and avoid manual note-taking.

Highlights
  • Calculation history and review
  • Edit past calculations and recalculate
  • Tax-inclusive and exclusive calculation modes
  • Standard and reduced tax rate switching
  • Clear division and remainder display
  • Create and copy calculation sheets
Read full description

Calc+α is an app designed to make daily calculations easier and more efficient. Each feature is intuitive, enabling anyone to use it effortlessly. Whenever there's a need for calculations, Calc+α will be your reliable partner. **Calculation Sheet with History** Calculator+α saves your past calculations in a list, allowing you to review them anytime. It displays subtotals for each calculation, making verification simple. For different purposes like travel or shopping, you can create and copy various sheets to organize your calculations. No need to note down the calculation results on paper anymore. **Mistake Correction Feature** No worries about mistakes. You can edit past calculations and recalculate. By changing numbers, adding or removing rows, you can proceed with your calculations accurately. **Tax Rate Calculation** Switch between tax-inclusive and tax-exclusive calculations with just one button. Furthermore, effortlessly switch between standard and reduced tax rates, smoothing out calculations for products with different tax rates. **Division and Remainder Calculation** With a clear remainder display, you can instantly grasp intermediate results in calculations. By setting the truncation position, you can adjust the display of remainders to your liking. No more headaches with remainders in division.

About

RedoCalc

Features
Read full description

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.

Screenshots

Calc+α4 screens
RedoCalc3 screens

Verdict

The call

The clearest difference is update cadence: RedoCalc at every 3 days against Calc+α's every 3 weeks. Calc+α's advantage is iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calc+α ships an update every 3 weeks, RedoCalc every 3 days. The most recent releases landed on July 27, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 6 level
Calc+α versus RedoCalc: the parameters behind the verdict, then further details
ParameterCalc+αRedoCalc
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhoneiPhone
Requires iOS16.4 — better18.0
Further details — not scored
Size9 MB3 MB
Age rating4+4+
DeveloperAriane Inc.Toshiyuki Kuwabara

In-app purchases

None

Calc+α

No in-app purchases

None

RedoCalc

No in-app purchases

Questions

Is Calc+α free?
Calc+α is free to download, with no in-app purchases.
Is RedoCalc free?
RedoCalc is free to download, with no in-app purchases.
Do Calc+α or RedoCalc have ads?
Both Calc+α and RedoCalc show ads.
Which is updated more often, Calc+α or RedoCalc?
Calc+α ships an update every 3 weeks, and RedoCalc every 3 days. Most recently, Calc+α was updated on July 27, 2026 and RedoCalc on September 8, 2026.

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