Comparison

Calculator83 vs RedoCalc

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

Head to head
About

Calculator83

A minimalist calculator app focused on simplicity and a clean workflow. It offers both basic and scientific modes, allowing users to perform calculations without complex settings. Get started quickly with this straightforward tool.

Highlights
  • Minimalist design
  • Clean workflow
  • Basic mode
  • Scientific mode
  • Easy to use
Features
Read full description

Calculator83 is a minimalist calculator designed with simplicity to the core and an emphasis on a clean workflow. Be up and running in seconds! Featuring two modes of operation, basic and scientific. The goal of this app is to allow users to have a powerful calculator without the fuss of learning all the settings of a powerful calculator.

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

Calculator833 screens
RedoCalc3 screens

Verdict

The call

The clearest difference is ads: Calculator83 at none against RedoCalc's shown. Calculator83 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). RedoCalc's advantage is update cadence (every 3 days vs every 20 months). On price and in-app purchases 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

Calculator83 ships an update every 20 months, RedoCalc every 3 days. The most recent releases landed on October 14, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
Calculator83 versus RedoCalc: the parameters behind the verdict, then further details
ParameterCalculator83RedoCalc
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings4 — better—
Update frequencyEvery 20 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size10 MB3 MB
Age rating4+4+
DeveloperLyker Labs LLCToshiyuki Kuwabara

In-app purchases

None

Calculator83

No in-app purchases

None

RedoCalc

No in-app purchases

Questions

Is Calculator83 free?
Calculator83 is free to download, with no in-app purchases.
Is RedoCalc free?
RedoCalc is free to download, with no in-app purchases.
Do Calculator83 or RedoCalc have ads?
RedoCalc shows ads; Calculator83 does not.
Which is updated more often, Calculator83 or RedoCalc?
Calculator83 ships an update every 20 months, and RedoCalc every 3 days. Most recently, Calculator83 was updated on October 14, 2026 and RedoCalc on September 25, 2026.

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