ZiadaTime vs Calculator Sci Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZiadaTime
Manage multiple stopwatches simultaneously for various tasks. Start, stop, or reset them individually or all at once. Ideal for timing multiple events concurrently.
- Create a list of stopwatches
- Start, stop, or reset stopwatches individually
- Start, stop, or reset stopwatches simultaneously
- Track elapsed time for multiple events
- Ideal for coaching or cooking
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ZiadaTime is a multi-stopwatch utility where you can create a list of stopwatches. You can start, stop or reset them simultaneously or individually. It's now easy to, for instance, start several runners at the same time, and then stop them individually. Coach runners, cook food, keep track of elapsed time for different things.. at the same time! Please leave a review!
Calculator Sci Unit Converter
This app offers a robust calculator with both standard and scientific functions. It includes a unit converter for various measurements and currency, plus helpful shortcuts for percentages, taxes, and tips. All calculations are saved locally for easy access.
- Standard and scientific calculator modes
- Unit conversion for length, weight, temperature, currency
- Full calculation history log
- Percentage, tax, and tip calculation shortcuts
- Offline functionality
- Optimized for phone and tablet
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A fast, clean calculator for everyday math and deeper work. Switch to scientific mode for trig, powers, and logs, then convert length, weight, temperature, and currency without leaving the app. Need to check an old result? Your calculation history stays on device so you can copy, reuse, or review past entries anytime. Percentage, tax, and tip helpers make shopping and dining math effortless. • Standard & scientific calculator • Unit converter: length, weight, temp, currency • Full calculation history with copy • Percent, tax, and tip shortcuts • Offline-first — no account required • Optimized for phone and tablet Perfect for students, professionals, and anyone who wants a reliable calculator that respects your privacy.
Screenshots
Verdict
The clearest difference is price: ZiadaTime at Free against Calculator Sci Unit Converter's $1.99. ZiadaTime also leads on rating (5.0 vs 4.0) and update cadence (every 5 days vs monthly). Calculator Sci Unit Converter's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.0). On ratings volume, ads 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
ZiadaTime is free to download; Calculator Sci Unit Converter costs $1.99 up front. ZiadaTime sells 3 one-off in-app purchases. Calculator Sci Unit Converter asks for nothing beyond the download.
ZiadaTime holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
ZiadaTime ships an update every 5 days, Calculator Sci Unit Converter monthly. The most recent releases landed on November 1, 2026 and October 11, 2026 respectively.
| Parameter | ZiadaTime | Calculator Sci Unit Converter |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (3 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 5 days — better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Purmonen | Xiamen City Fanyou Network Technology Co., Ltd. |
Customer experience
ZiadaTime
Calculator Sci Unit Converter
In-app purchases
ZiadaTime
- Coffee$0.99
- Snack$1.99
- Lunch$4.99
Calculator Sci Unit Converter
No in-app purchases
Questions
Is ZiadaTime free?
Is Calculator Sci Unit Converter free?
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