# Thermoco vs Mercury

The clearest difference is rating: Mercury at 4.0 against Thermoco's 2.5. Mercury also leads on review sentiment (100% vs 67%). Thermoco's advantage is in-app purchases (none vs 5) and iOS requirement (12.0 vs 26.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Mercury sells 5 one-off in-app purchases. Thermoco asks for nothing beyond the download.

Mercury holds the better App Store score, 4.0 against 2.5. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 67% of Thermoco's written reviews are positive against 100% of Mercury's.

Thermoco ships an update every 56 months, Mercury every 70 months. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Thermoco | Mercury |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (4 ratings)](https://appshunter.io/ios/app/thermoco/id1059414913/reviews) | **[4.0 (6 ratings)](https://appshunter.io/ios/app/mercury-temperature-converter/id1494415587/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 56 months** | Every 70 months |
| Monetization | Free | Free |
| Size | 11 MB | 4 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [K SOLUTION LLC](https://appshunter.io/developer/289670447) | [Samuel Herrera](https://appshunter.io/developer/962670797) |

## What reviewers say

### Thermoco

[App page](https://appshunter.io/ios/app/thermoco/id1059414913)

Monitor and record temperature in various environments like refrigerators, incubators, or tents. This app connects wirelessly to a coin-sized smart gadget to display real-time and historical temperature data on your phone.

**Highlights:** Real-time temperature monitoring, Temperature history recording, Graph visualization, Wireless connection to smart gadget, Device naming, Temperature calibration

**Features:** macOS Compatibility

**In-app purchases:** none


### Mercury

[App page](https://appshunter.io/ios/app/mercury-temperature-converter/id1494415587)

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.

**Highlights:** Celsius, Fahrenheit, Kelvin conversion, Interactive temperature scrolling, Dynamic background color, Reset to zero function, Decimal temperature support

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| Massive Tip | $9.99 | one-time |


## Frequently asked questions

### Is Thermoco free?

Thermoco is free to download, with no in-app purchases.

### Is Mercury free?

Mercury is free to download, with in-app purchases available.

### Which has better reviews, Thermoco or Mercury?

Mercury is rated higher. Thermoco averages 2.5 out of 5 from 4 ratings, while Mercury averages 4.0 from 6 ratings.

### Do Thermoco or Mercury have ads?

Neither Thermoco nor Mercury shows ads.

### Which is updated more often, Thermoco or Mercury?

Thermoco ships an update every 56 months, and Mercury every 70 months. Most recently, Thermoco was updated on October 10, 2026 and Mercury on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*