Twin vs NextNavi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Twin
This app combines two calculators into one, allowing for side-by-side or stacked calculations. Easily copy and paste results between calculators or to other apps. It displays formulas for clarity and handles basic arithmetic operations.
- Two calculators in one
- Side-by-side and stacked display
- One-touch copy/paste between calculators
- Copy results to iPhone memory
- Formula display
- Basic arithmetic operations
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A simple and easy-to-use calculator app that combines two calculators into one. Calculators are displayed side by side when the screen is horizontal, and vertically when the screen is vertical. In addition to being able to perform separate calculations with each calculator, calculation results can be also copy and paste with one touch, so you can perform other calculations during calculations, making it even more convenient to use than you might imagine. There is also a free version with ads. Please try it first. https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=jp 【feature】 1. Calculation results can be copy and paste between two calculators with one touch. 2. The result calculated can be input from one calculator to the other with one touch. ・When press the "→" key, the calculation result of the left calculator is entered at the end of the formula on the right calculator. ・When press the "←" key, the calculation result of the right calculator is entered at the end of the formula on the left calculator. 3. add, subtract, multiply and divide is performed. Do multiplication and division first, then add and subtract. 4. Display the formula The entered formula is displayed under the result, so you can easily check the operations. 5. Calculation results can be copied to iPhone’s memory Calculation results can be pasted into other apps as text , so transcription errors will not occur. Example of use When you find a product for 988 yen for 3 pieces and a product for 1245 yen for 4 pieces while shopping, you can easily calculate "Which is cheaper?" And “How cheaper?"with this calculator. 1) Use the left and right calculators to find the unit price of the product (unit price = product price/number). 2) Tap the "- key" and "arrow key" on either the left or right calculator to calculate the unit price difference. Limitations ・Answer can be calculated up to 9 digits, minimum 0.000000001. Note The free version can be downloaded from https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=en
NextNavi
This utility app provides a dedicated browser for playing web-based games. It offers customization options for your screen and ensures a consistent landscape view for a desktop-like gaming experience.
- Dedicated browser for web games
- Screen customization options
- Always landscape desktop view
- Optimized for browser gaming
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A browser for browser games that allows you to customize your screen and always stay in landscape in desktop view.
Screenshots
Verdict
Twin and NextNavi both sit at 5.0 stars, but that hides the real split: 76% of Twin's written reviews are positive against 55% of NextNavi's. Twin also leads on price ($1.99 vs $3.99). NextNavi's advantage is update cadence (every 5 days vs fortnightly) and iOS requirement (12.0 vs 15.0). On rating, ratings volume, ads and in-app purchases 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
Twin costs $1.99 and NextNavi $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Twin against 5.0 for NextNavi. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews are what separate them: 76% of Twin's written reviews are positive against 55% of NextNavi's.
Twin ships an update fortnightly, NextNavi every 5 days. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.
| Parameter | Twin | NextNavi |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Rating | 5.0 (8 ratings) | 5.0 (5 ratings) |
| Positive reviews | 76.0% of reviews — better | 55.0% of reviews |
| Number of ratings | 8 — better | 5 |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | Hiroyuki Ueda | 建玮 朱 |
Customer experience
Twin
NextNavi
In-app purchases
Twin
No in-app purchases
NextNavi
No in-app purchases
