RedoCalc vs ClassicTimer
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.
ClassicTimer
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ClassicTimer brings the charm of a classic kitchen timer to your iPhone. INTUITIVE DIAL Turn the dial to set your time, release to start. Tap to pause, double-tap to reset. It's that simple. 4 SCALES Switch between 6, 12, 36, and 72-minute scales. Perfect for cooking, studying, workouts, and more. LIGHT & DARK MODE Switch with a single tap. Choose the look that suits your style or time of day. WIDGETS & LIVE ACTIVITIES Start a timer right from your Home Screen widget. See real-time countdown on your Lock Screen and Dynamic Island. BACKGROUND NOTIFICATIONS Get notified when your timer is done, even while using other apps. PRO (ONE-TIME PURCHASE) โข Remove all ads โข Color customization (body, dial, ticks, needle, background) โข Background image customization (choose from your photo library) Simple, beautiful, and uniquely yours. Terms of Use: https://10half.jp/classictimer/terms.en.html Privacy Policy: https://10half.jp/classictimer/privacy.en.html
Screenshots
Verdict
The clearest difference is in-app purchases: RedoCalc at none against ClassicTimer's 1. RedoCalc also leads on update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement 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. ClassicTimer sells 1 one-off in-app purchase. RedoCalc asks for nothing beyond the download.
RedoCalc ships an update every 3 days, ClassicTimer fortnightly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.
| Parameter | RedoCalc | ClassicTimer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days โ better | Fortnightly |
| Ads | Yes | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone | iPhone, iPad โ better |
| Requires iOS | 18.0 | 17.0 โ better |
| Further details โ not scored | ||
| Size | 3 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Toshiyuki Kuwabara | 10HALF LLC |
In-app purchases
RedoCalc
No in-app purchases
ClassicTimer
- ClassicTimer Pro$1.99









