Comparison

Calculation vs Reverse Recorder

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

Head to head

Calculation

Simple calculator app

Instant reverse playback

$1.99

🔧 Utilities

No ratingsView app →

About

Calculation

Read full description

A simple and free calculator app that anyone can use easily. Fast and accurate calculations with automatically saved calculation history. Perfect for daily use, study, and work with a clean and simple design.

About

Reverse Recorder

Features

Read full description

Reverse your voice! Record and hear it played backwards instantly! How to use: 1. Tap the mic button and speak 2. Release to auto-reverse! 3. Listen to your reversed voice Feature: • One-touch recording & auto-reverse • Real-time waveform visualization • Share reversed audio • Dark mode support Fun for the whole family!

Screenshots

Calculation2 screens

Reverse Recorder3 screens

Verdict

The call

The clearest difference is price: Calculation at Free against Reverse Recorder's $1.99. Calculation also leads on iOS requirement (16.0 vs 18.6). Reverse Recorder's advantage is ads (none vs shown). On update cadence, 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

Calculation is free to download; Reverse Recorder costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calculation ships an update every 2 months, Reverse Recorder every 5 weeks. Both last shipped on October 28, 2026.

Scorecard3 real differences · 3 level

Calculation versus Reverse Recorder: the parameters behind the verdict, then further details
Parameter	Calculation	Reverse Recorder
Price	Free — better	$1.99
Update frequency	Every 2 months	Every 5 weeks — better
Ads	Yes	No — better
In-app purchases	No	No
Devices	iPhone	iPhone, iPad — better
Requires iOS	16.0 — better	18.6
Further details — not scored
Size	7 MB	3 MB
Age rating	4+	4+
Developer	SooRyong Hyun	Science Fiction Inc.

In-app purchases

None

Calculation

No in-app purchases

None

Reverse Recorder

No in-app purchases

Questions

Is Calculation free?

Calculation is free to download, with no in-app purchases.

Is Reverse Recorder free?

Reverse Recorder costs $1.99, with no in-app purchases.

Do Calculation or Reverse Recorder have ads?

Calculation shows ads; Reverse Recorder does not.

Which is updated more often, Calculation or Reverse Recorder?

Calculation ships an update every 2 months, and Reverse Recorder every 5 weeks. Most recently, Calculation was updated on October 28, 2026 and Reverse Recorder on October 28, 2026.