Tabi Calc vs Quick Math for Watch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tabi Calc
This app is a travel-focused calculator that simplifies date, time, and currency calculations. It helps users plan trips, manage itineraries, and convert currencies with live or offline rates. Designed for travelers, it offers an intuitive interface and accurate results.
- Date and time difference calculations
- Add/subtract days, months, years from dates
- Multi-currency converter with live/offline rates
- Supports over 160 currencies
- Location-based currency suggestions
- Offline currency rate support
- Saves recent calculations
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Your essential calculator for travel – Tabi Calc handles time, date, and currency effortlessly. Tabi Calc is a smart, travel-focused calculator designed to make your journey planning and on-the-go calculations faster, simpler, and more accurate. Whether you're figuring out time zones, calculating the duration of a trip, or converting foreign currency, Tabi Calc does it all in one intuitive interface. Date & Time Calculator Easily calculate time differences and durations: Find out how many days, weeks, or hours between two dates. Add or subtract days, months, or years from any date. Perfect for planning itineraries, visa durations, or work schedules across time zones. Currency Converter Convert currencies with live or offline rates: Automatically detects your location to suggest local currency. Supports over 160 currencies with frequently updated exchange rates. Works offline with previously fetched rates—ideal for travel without data. Made for Travelers Tabi Calc was designed with travelers in mind: One tool for all your date, time, and currency needs. Compact, fast, and easy to use—even on the go. Saves recent calculations for quick reference. International Support Handles regional date formats and localization. Accurate with leap years, daylight saving time, and calendar math. Designed to support users worldwide. More Than Just a Calculator Tabi Calc is built to be both powerful and simple: Clean, distraction-free interface. No ads, no clutter—just focused tools to get the job done. Precise results powered by a calculation engine built for accuracy. Whether you're a frequent flyer, digital nomad, travel planner, or just someone who needs a smarter calculator, Tabi Calc is the perfect companion for navigating dates, times, and currencies with confidence. Download Tabi Calc now and travel smarter.
Quick Math for Watch
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Quick Math is a powerful math calculation built exclusively for the watch. Unlike other math apps which shows a bunch of buttons, this is similar to how people writes math expression: as a text of expression. The app parses this expression which was done via hand drawing and voice input feature on the watch, then validates and compute the result. Many features include - Lots of operators and functions, in some cases you can use either operator or function - Support simple algebra like addition, subtraction to nifty conversion like degree to radian, to more advanced expression like sin, power, log - Support complex expression, you can use decimal number, fraction and parenthesis to group numbers - Save a history of previous executed expressions - A dedicated guide page with all the operators you will need
Screenshots
Verdict
The clearest difference is price: Tabi Calc at Free against Quick Math for Watch's $5.99. Tabi Calc also leads on update cadence (fortnightly vs every 41 months). Quick Math for Watch's advantage is in-app purchases (none vs 3) and iOS requirement (15.0 vs 17.0). On 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
Tabi Calc is free to download; Quick Math for Watch costs $5.99 up front. Tabi Calc sells 3 in-app purchases, starting at $0.99 per month. Quick Math for Watch asks for nothing beyond the download.
Tabi Calc ships an update fortnightly, Quick Math for Watch every 41 months. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.
| Parameter | Tabi Calc | Quick Math for Watch |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 3.9 (40 ratings) — better | — |
| Positive reviews | 43.9% of reviews | — |
| Number of ratings | 40 — better | — |
| Update frequency | Fortnightly — better | Every 41 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Niwa | Khuong Pham |
In-app purchases
Tabi Calc
- Monthly Subscription1 Month trial$0.991 Month
- 6 month subscription$4.496 Months
- Yearly Subscription$7.991 Year
Quick Math for Watch
No in-app purchases








