WonderCalc vs OTenkeyCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WonderCalc
This utility app handles all your basic calculation needs, including unit conversions for length, weight, and temperature. It also offers advanced financial calculations for loans, such as monthly payments, total cost, and interest paid.
- Basic calculations
- Cut, copy, and paste functionality
- Unit conversions (length, weight, temperature)
- Loan payment calculations
- Total loan cost and interest calculation
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WonderCalc performs all basic calculations, and allows you to cut, copy, and paste values to and from other apps. It can convert between units of length, weight, and temperature. It allows you to calculate monthly payments, as well as total cost and interest paid on the life of a loan.
OTenkeyCalc
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Numeric ten keypad calculator that also displays the current temperature and weather at your current location * Weather information source: Apple Weather Service https://developer.apple.com/weatherkit/data-source-attribution/ https://support.apple.com/ja-jp/105038
Screenshots
Verdict
The clearest difference is ads: WonderCalc at none against OTenkeyCalc's shown. WonderCalc also leads on update cadence (every 5 days vs every 2 weeks). On price, in-app purchases, device support and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
WonderCalc ships an update every 5 days, OTenkeyCalc every 2 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | WonderCalc | OTenkeyCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 16.7.10 |
| Further details — not scored | ||
| Size | 5 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | SharkMonkey Apps | Hideaki Uchikoshi |
In-app purchases
WonderCalc
No in-app purchases
OTenkeyCalc
No in-app purchases
