Temperature Converter vs Mercury
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Temperature Converter
Easily convert temperatures between Celsius, Fahrenheit, and Kelvin with a clean and intuitive interface. This utility app offers quick and accurate conversions for everyday use. Ads are present but can be removed via a one-time purchase.
- Celsius conversion
- Fahrenheit conversion
- Kelvin conversion
- User-friendly interface
- Ad removal option
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A striking & user-friendly temperature converter! Quickly convert temperatures between Celsius, Fahrenheit & Kelvin. Ad Supported. Ads can be removed with a one-time in-app purchase.
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
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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
The clearest difference is rating: Temperature Converter at 4.8 against Mercury's 4.0. Temperature Converter also leads on update cadence (every 6 months vs every 70 months) and ratings volume (6.3K vs 6). Mercury's advantage is monetization model (free vs free with in-app purchases) and review sentiment (100% vs 91%). On price, ads, in-app purchases 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
Both are free to download. Temperature Converter sells 3 one-off in-app purchases and Mercury sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Temperature Converter holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Temperature Converter has 6.3K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 91% of Temperature Converter's written reviews are positive against 100% of Mercury's, so the app with the better star average is not the one people write more warmly about.
Temperature Converter ships an update every 6 months, Mercury every 70 months. Both last shipped on October 24, 2026.
| Parameter | Temperature Converter | Mercury |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (6.3K ratings) — better | 4.0 (6 ratings) |
| Positive reviews | 91.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 6.3K — better | 6 |
| Update frequency | Every 6 months — better | Every 70 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 11 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Armchair Engineering | Samuel Herrera |
Customer experience
Temperature Converter
Mercury
Bugs and requests
Temperature Converter
Reported bugs
2 issues- Inaccurate Kelvin temperature conversions
- Occasional crashes or freezes
Requested features
3 requests- Add Rankine temperature scale
- Increase font size for better readability
- Provide color customization options
Mercury
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Temperature Converter
- Upgrade Reduced$0.99
- Upgrade$1.99
- Upgrade Hero$3.99
Mercury
- Small Tip$0.99
- Remove Ads$1.99
- Medium Tip$2.99
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- Large Tip$4.99
- Massive Tip$9.99
Questions
Is Temperature Converter free?
Is Mercury free?
Which has better reviews, Temperature Converter or Mercury?
Do Temperature Converter or Mercury have ads?
Which is updated more often, Temperature Converter or Mercury?
Other comparisons
