Comparison

RedoCalc vs DEDEDEN

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

Head to head
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.

About

DEDEDEN

Features
Read full description

Customize your calculator to match your style. Change backgrounds and button designs to create a calculator that feels uniquely yours. ■ Key Features • Customize background colors and background images • Change button designs • Create multiple calculator designs • Switch between multiple designs • Simple and easy-to-use calculator functions ■ Free Version • Enjoy full access to all features for a limited time. • Once the period ends, design customization features will be restricted. • Once the period ends, you can only use your favorited designs. • Extend your full-access period by watching ads. ■ Pro Version • Unlimited access with no time limits or feature restrictions ■ Payments • Paid features are available via one-time purchase (lifetime full access) • Pay once, enjoy forever. Make everyday calculations more enjoyable with your own custom design.

Screenshots

RedoCalc3 screens
DEDEDEN4 screens

Verdict

The call

The clearest difference is in-app purchases: RedoCalc at none against DEDEDEN's 1. RedoCalc also leads on update cadence (every 3 days vs every 3 weeks). DEDEDEN's advantage is iOS requirement (15.0 vs 18.0). On price, ads 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. DEDEDEN sells 1 one-off in-app purchase. RedoCalc asks for nothing beyond the download.

UpkeepUpdate frequency

RedoCalc ships an update every 3 days, DEDEDEN every 3 weeks. The most recent releases landed on September 25, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 3 level
RedoCalc versus DEDEDEN: the parameters behind the verdict, then further details
ParameterRedoCalcDEDEDEN
PriceFreeFree
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size3 MB25 MB
Age rating4+4+
DeveloperToshiyuki KuwabaraTarinai Works

In-app purchases

None

RedoCalc

No in-app purchases

1 purchases

DEDEDEN

One-time1
  • Full Feature Unlock$1.99

Questions

Is RedoCalc free?
RedoCalc is free to download, with no in-app purchases.
Is DEDEDEN free?
DEDEDEN is free to download, with in-app purchases available.
Do RedoCalc or DEDEDEN have ads?
Both RedoCalc and DEDEDEN show ads.
Which is updated more often, RedoCalc or DEDEDEN?
RedoCalc ships an update every 3 days, and DEDEDEN every 3 weeks. Most recently, RedoCalc was updated on September 25, 2026 and DEDEDEN on October 13, 2026.

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