A Complex Calc vs DecimalClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A Complex Calc
Perform complex calculations with a modern, user-friendly interface. Offers both basic and scientific modes, including support for complex numbers and advanced functions. This lightweight application provides a history of computations and is completely free with no advertisements.
- Complex number support
- Basic and Scientific modes
- History of operations
- Trigonometric and hyperbolic functions
- Random number generation
- Lightweight app size
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A Complex Calc is built for fast complex-number work without losing the tools you need for serious math. Use scientific functions quickly and check floating-point results in rectangular and polar form. Reuse past results from history, work with built-in constants, and keep advanced tools close while solving everyday and technical calculations.
DecimalClock
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DecimalClock is more than a clock – it’s an idea that challenges routine. Experience a day divided into 10 hours, 100 minutes per hour, and 100 seconds per minute. It blends classic and decimal time in one calm, minimalist space where design meets precision. • Classic and decimal time modes • Full-screen mode for both analog and digital clocks • Converter between classic and decimal time • Customizable colors and fonts • Works offline – no ads, no distractions • Optimized for iPad • Educational tool for schools and curious minds In 1793, France introduced decimal time as a bold experiment. Now, it returns – reimagined for today, in the palm of your hand.
Screenshots
Verdict
The clearest difference is price: A Complex Calc at Free against DecimalClock's $2.99. A Complex Calc also leads on iOS requirement (10.0 vs 16.6). DecimalClock's advantage is update cadence (weekly vs every 3 weeks). On ads, 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
A Complex Calc is free to download; DecimalClock costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
A Complex Calc ships an update every 3 weeks, DecimalClock weekly. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.
| Parameter | A Complex Calc | DecimalClock |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.7 (23 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 23 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 28 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Antonio Ruffolo | Kaspars Sops |
In-app purchases
A Complex Calc
No in-app purchases
DecimalClock
No in-app purchases
Questions
Is A Complex Calc free?
Is DecimalClock free?
Do A Complex Calc or DecimalClock have ads?
Which is updated more often, A Complex Calc or DecimalClock?
Other comparisons
