inchCALC vs Mercury
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
inchCALC
This app serves as an entry-level construction calculator designed for users who frequently work with feet, inches, and fractions. It simplifies complex calculations involving these dimensions, transforming your device into a handy tool for builders, designers, and DIY enthusiasts.
- Calculates feet, inch, and fraction dimensions
- Simplifies addition, subtraction, multiplication, and division
- Inputs and outputs dimensions like a tape measure
- Useful for builders, contractors, and DIYers
- Transforms device into a construction calculator
Read full descriptionHide full description
ENTRY LEVEL [FOOT • INCH • FRACTION] CALCULATOR MACWORLD **** "inchCALC's ease of use coupled with its advanced features make this an uncommonly good addition to a crowded genre." 3/9/09 inchCALC is an entry level construction calculator for people who work with the FEET• INCH• FRACTION dimensions used common rulers and tape measures. These dimensions are shear drudgery when you have to manually add or subtract them --- let alone multiply or divide. If you are a builder, contractor, sub-contractor, architect, engineer, artist, designer, student, homemaker or DIYer, you know the importance of working with accurate dimensions. inchCALC™ tranforms your iPhone / iPod Touch into an easy to use FT• IN• FRACTION construction calculator that inputs and outputs dimensions exactly as they appear on a tape measure. With inchCALC you can inexpensively perform the functions of expensive dedicated calculators on your iPhone / iPod Touch. Click on our website below to see feature details. If you like what you see, the full version, inchCALC+, has many more features, including conversion to METRIC & built-in TRIANGLE SOLVING. Look up inchCALC+ in iTunes
Mercury
Easily convert temperatures between Celsius, Fahrenheit, and Kelvin with an elegant and intuitive interface. Features dynamic background color changes based on temperature and supports decimal conversions.
- Celsius, Fahrenheit, Kelvin conversion
- Interactive temperature scrolling
- Dynamic background color
- Reset to zero function
- Decimal temperature support
Read full descriptionHide full description
Mercury is the best temperature converter for Celsius, Fahrenheit and Kelvin. Elegant and easy to use. • Convert Celsius, Fahrenheit and Kelvin. • Scroll with your finger to change the current temperature. • Watch as the background color changes while you go hotter or colder. • Reset to zero with a quick tap. • Support for decimal temperature conversion.
Screenshots
Verdict
inchCALC and Mercury both sit at 3.9 stars, but that hides the real split: 100% of Mercury's written reviews are positive against 53% of inchCALC's. Mercury also leads on price (Free vs $1.99). inchCALC's advantage is in-app purchases (none vs 5) and update cadence (every 2 months vs every 70 months). On rating, ratings volume, 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
Mercury is free to download; inchCALC costs $1.99 up front. Mercury sells 5 one-off in-app purchases. inchCALC asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.9 for inchCALC against 4.0 for Mercury. Both are backed by a comparable volume of ratings — 15 and 6 respectively. Written reviews are what separate them: 53% of inchCALC's written reviews are positive against 100% of Mercury's.
inchCALC ships an update every 2 months, Mercury every 70 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.
| Parameter | inchCALC | Mercury |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.9 (15 ratings) | 4.0 (6 ratings) — better |
| Positive reviews | 53.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 6 |
| Update frequency | Every 2 months — better | Every 70 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 19 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | River Studio | Samuel Herrera |
Customer experience
inchCALC
Mercury
In-app purchases
inchCALC
No in-app purchases
Mercury
- Small Tip$0.99
- Remove Ads$1.99
- Medium Tip$2.99
Show 2 moreShow fewer
- Large Tip$4.99
- Massive Tip$9.99
Questions
Is inchCALC free?
Is Mercury free?
Which has better reviews, inchCALC or Mercury?
Do inchCALC or Mercury have ads?
Which is updated more often, inchCALC or Mercury?
Other comparisons















