CalcFast vs Test Strip Scanner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalcFast
A fast and elegant calculator for Apple devices that displays your calculation history. It offers a Today Extension for quick access and supports Apple Watch, external keyboards, and VoiceOver.
- Calculation history display
- Today Extension for quick calculations
- Apple Watch app
- Dark/light mode selection
- External keyboard support
- VoiceOver support
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Fast and simple calculator for iPad, iPhone and Apple Watch that shows the calculation history, includes a Today Extension that allows for fast calculation by swiping down and 3D Touch for quick interactions. Numbers are formatted for your country, i.e. period in the US and comma in Europe. Ever lost your train of thought half way through a calculation and thought how handy it would be to review your calculations. The aim of this Calculator is to be fast, elegant and simple. Features: - The calculator can open side by side or over other apps in iPadOS. - Select dark or light mode. - External keyboard support. - Smart Apple Watch Calculator included. - Light weight Today Extension included. - Calculations shown when input and on tape. - Key click confirms pressing of buttons, which may be turned off. - Previous calculation is repeated when the equal sign is pressed. - Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe. The number of decimal digits may be set in the Settings. - VoiceOver is supported. - Calculations Tape may be deleted by Tapping on it.
Test Strip Scanner
Easily read water test strip results by taking a photo. View and export charts of chemical readings over time. Ideal for those with visual impairments or limited patience.
- Scan test strip results with photos
- Save and view readings
- Export charts of chemical trends
- Supports multiple popular water test strips
- No account signup required
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Test Strip Scanner makes it easy to read results from some of the most popular water test strips on the market. No signing up for an account, no data being funneled into a large company, no annoying notifications, just a handy little utility for water analysis. Test Strip Scanner lets you scan and save the readings of your strip by simply taking a photo. After that you can view & export charts of each chemical reading over your desired time frame. Test Strip Scanner is great for those with poor eyesight, colorblindness, and low patience. Test Strip Scanner supports the following strips: Water - JNW Pool & Spa 7in1 - Easy Test 7in1 - Aquachek Select Connect - HTH 6-way - Baracuda 6in1 And more to come in the future!
Screenshots
Verdict
The clearest difference is rating: CalcFast at 4.2 against Test Strip Scanner's 3.2. CalcFast also leads on review sentiment (78% vs 50%). Test Strip Scanner's advantage is update cadence (every 5 days vs every 2 months) and iOS requirement (16.0 vs 18.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CalcFast holds the better App Store score, 4.2 against 3.2. Both are backed by a comparable volume of ratings — 20 and 9 respectively. Written reviews point the same way: 78% of CalcFast's written reviews are positive against 50% of Test Strip Scanner's.
CalcFast ships an update every 2 months, Test Strip Scanner every 5 days. The most recent releases landed on September 19, 2026 and September 23, 2026 respectively.
| Parameter | CalcFast | Test Strip Scanner |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (20 ratings) — better | 3.2 (9 ratings) |
| Positive reviews | 78.3% of reviews — better | 50.0% of reviews |
| Number of ratings | 20 — better | 9 |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Hannes Sverrisson | Quentin Reiser |
Customer experience
CalcFast
Test Strip Scanner
In-app purchases
CalcFast
No in-app purchases
Test Strip Scanner
No in-app purchases
Questions
Is CalcFast free?
Is Test Strip Scanner free?
Which has better reviews, CalcFast or Test Strip Scanner?
Do CalcFast or Test Strip Scanner have ads?
Which is updated more often, CalcFast or Test Strip Scanner?
Other comparisons
