kong calculator vs Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
kong calculator
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It is a simple calculator that provides a calculation history function.
Unit Converter
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This is an efficient tool app that integrates a professional calculator with multi-unit conversion functionality. Supports complex expression calculations and multiple categories of physical unit conversions, meeting various calculation needs in study, work, and daily life. 【Core Feature Highlights】 Powerful Expression Calculation Engine ￭ Supports complex mathematical operations (e.g., 2.5 × 3.8 + 1.2 ÷ 0.4) ￭ Scientific notation display ￭ Real-time calculation result preview ￭ Customizable decimal precision Comprehensive Unit Conversion Support ￭ Length, Mass, Time, Current, Temperature, Acceleration, Area, Charge, Force, Frequency, Plane Angle, Solid Angle, Speed, Volume User-Friendly Experience ￭ Save frequently used unit pairs for quick access ￭ Switch freely between dark and light themes ￭ Simple and intuitive interface Smart Conversion Experience ￭ One-tap unit swap function ￭ Copy calculation results and full formulas
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Verdict
The clearest difference is in-app purchases: kong calculator at none against Unit Converter's 1. kong calculator also leads on update cadence (every 4 days vs every 2 weeks). Unit Converter's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price 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
Both are free to download. Unit Converter sells 1 one-off in-app purchase. kong calculator asks for nothing beyond the download.
kong calculator ships an update every 4 days, Unit Converter every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | kong calculator | Unit Converter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Changyeol Seo | 伟鹏 李 |
In-app purchases
kong calculator
No in-app purchases
Unit Converter
- Unlock Premium Membership$0.99
Questions
Is kong calculator free?
Is Unit Converter free?
Do kong calculator or Unit Converter have ads?
Which is updated more often, kong calculator or Unit Converter?
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