convrt vs ExSciCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
convrt
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After selecting a category and an associated unit an input value has to be provided. Once input has been provided and the “Convert" button has been clicked, the keyboard will be dismissed, and the conversion results will be listed in a table underneath the input field. The selected category and unit will appear as the button title. Checks will be executed the validate the input provided. An error message will be displayed if invalid input is entered. All categories can deal with decimal input including decimal places. Exceptions are the categories 'Numeral' and 'Data'. These categories don't allow decimal places. For the 'Numeral' category input depends on the selected unit; binary only allows 0 and 1, octal only allows for 0..7, decimal only allows for 0..9 and hexadecimal allows for 0..9 and A..F. The categories Circle, Data and Temperature have an option “Table" in the Unit list. When selected the app will list formulas used to execute the conversions (for Circle and Temperature) and a table with all data storage units and how they relate to each other (for Data). Tables will be listed without the need to provide Input or pressing the Convert button. More detailed Help information is provided on the Help screen in the app. In settings you can set number of decimal places for each of the category's unit conversion results and if you want to use grouping separators. Also you have the option to change the color of the buttons on the main screen.
ExSciCalc
This calculator offers enhanced precision and memory beyond standard devices. It includes advanced functions for statistics, physics, and mathematics, alongside common calculations and unit conversions.
- Extended precision (30+ digits)
- Extended memory (main + 10 auxiliary)
- Scroll windows for button access
- Statistical calculations
- Physical and mathematical constants
- Unit conversions
- Roots of equations
- Special relativity calculations
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"Extended" scientific calculator has more features than typical calculators, including: • Extended precision (30+ digits), twice that of typical calculators. • Extended memory including a main memory with statistical information, and 10 auxiliary memory values. • Extended space for buttons using scroll windows--no confusing modes and function keys. • Extended functions not found on most calculators including (but not limited to): ◇ Statistical information for calculating standard deviation (tied to the M+ key) ◇ Most common physical constants and mathematical constants ◇ Extensive unit conversion constants ◇ Roots of polynomials and some transcendental equations ◇ Special relativity calculations • And normal functions including: ◇ Normal and hyperbolic trigonometry ◇ Various logs, powers and roots ◇ % calculations including interest and amortization ◇ Temperature conversion ◇ Random numbers ◇ Averages and means
Screenshots
Verdict
The clearest difference is price: convrt at Free against ExSciCalc's $1.99. ExSciCalc's advantage is update cadence (every 3 weeks vs every 25 months). On ads, in-app purchases, device support 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
convrt is free to download; ExSciCalc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
convrt ships an update every 25 months, ExSciCalc every 3 weeks. Both last shipped on October 2, 2026.
| Parameter | convrt | ExSciCalc |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 25 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Herbert Jonkman | Dale C Koepp |
In-app purchases
convrt
No in-app purchases
ExSciCalc
No in-app purchases









