Comparison

Note Calculator vs Test Strip Scanner

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Note Calculator

This app allows you to perform calculations by writing equations in a text format, similar to a notebook. It supports variables, grouping, and saves your work as text files for easy sharing.

Highlights
  • Text-based calculation input
  • Supports variables and grouping
  • Saves calculations as text files
  • Easy sharing with other apps
  • Improved percentage calculations
Features
Read full description

Note Calculator is a text-based calculator. Sometimes, performing calculations involving multiple equations can be challenging with a basic calculator, right? Using an app like Excel might feel too cumbersome and heavy for such tasks. Now, with Note Calculator, there's no need to worry. Simply write down your equations as if you were jotting them in a notebook, and it will automatically calculate them for you. You don't need to remember your calculations and results either. Your work is saved as text, which can be stored as a file and shared with any program that supports text. It couldn't be easier! Additionally, it supports variables, enabling you to perform calculations similar to simple programming: a = 3 b = 2 c = a + b Is it hard to remember or input variables? With a simple touch, you can select variables from a list or easily add new ones. Plus, you can group variables using blocks, allowing for even more advanced calculations. Key Features: - Text-based calculator - Supports variables for more complex calculations with ease! - Saves all calculations and results to a file - Supports grouping with blocks (for advanced calculations) - Easily share calculations and results with other apps (Message, Whatsapp, KakaoTalk) - Show calculation results up to the current cursor position - Percentage calculation improvement (e.g. $100 - 25% = $75)

About

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.

Highlights
  • 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
Read full description

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

Note Calculator4 screens
Test Strip Scanner4 screens

Verdict

The call

The clearest difference is price: Test Strip Scanner at Free against Note Calculator's $0.99. Test Strip Scanner also leads on update cadence (every 5 days vs fortnightly). Note Calculator's advantage is rating (5.0 vs 3.2) and review sentiment (86% vs 50%). On ratings volume, ads, in-app purchases and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Test Strip Scanner is free to download; Note Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Note Calculator holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews point the same way: 86% of Note Calculator's written reviews are positive against 50% of Test Strip Scanner's.

UpkeepUpdate frequency

Note Calculator ships an update fortnightly, Test Strip Scanner every 5 days. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
Note Calculator versus Test Strip Scanner: the parameters behind the verdict, then further details
ParameterNote CalculatorTest Strip Scanner
Price$0.99Free — better
Rating5.0 (4 ratings) — better3.2 (9 ratings)
Positive reviews86.4% of reviews — better50.0% of reviews
Number of ratings49 — better
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size5 MB14 MB
Age rating4+4+
DeveloperwoojooinQuentin Reiser

Customer experience

Note Calculator

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews22 reviews
Positive86.4%
Neutral9.1%
Negative4.5%

Test Strip Scanner

All ratings9 ratings
Positive55.6%
Neutral0.0%
Negative44.4%
Written reviews16 reviews
Positive50.0%
Neutral6.3%
Negative43.8%

In-app purchases

None

Note Calculator

No in-app purchases

None

Test Strip Scanner

No in-app purchases

Questions

Is Note Calculator free?
Note Calculator costs $0.99, with no in-app purchases.
Is Test Strip Scanner free?
Test Strip Scanner is free to download, with no in-app purchases.
Which has better reviews, Note Calculator or Test Strip Scanner?
Note Calculator is rated higher. Note Calculator averages 5.0 out of 5 from 4 ratings, while Test Strip Scanner averages 3.2 from 9 ratings.
Do Note Calculator or Test Strip Scanner have ads?
Neither Note Calculator nor Test Strip Scanner shows ads.
Which is updated more often, Note Calculator or Test Strip Scanner?
Note Calculator ships an update fortnightly, and Test Strip Scanner every 5 days. Most recently, Note Calculator was updated on September 17, 2026 and Test Strip Scanner on September 23, 2026.

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