# Infrared Temp vs Sutro

The clearest difference is review sentiment: Sutro at 73% against Infrared Temp's 0%. Sutro also leads on rating (3.9 vs 1.3) and update cadence (every 2 months vs every 4 months). Infrared Temp's advantage is iOS requirement (8.0 vs 12.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sutro holds the better App Store score, 3.9 against 1.3. Both are backed by a comparable volume of ratings — 53 and 175 respectively. Written reviews point the same way: 0% of Infrared Temp's written reviews are positive against 73% of Sutro's.

Infrared Temp ships an update every 4 months, Sutro every 2 months. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Infrared Temp | Sutro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (53 ratings)](https://appshunter.io/ios/app/infrared-temp/id924300241/reviews) | **[3.9 (175 ratings)](https://appshunter.io/ios/app/sutro/id1439627399/reviews)** |
| Number of ratings | 53 | **175** |
| Positive reviews | 0.0% of reviews | **72.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 36 MB | 39 MB |
| Requires iOS | **8.0** | 12.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RADIANT INNOVATION INC.](https://appshunter.io/developer/924300240) | [Sutro Connect Inc](https://appshunter.io/developer/1439627398) |

## What reviewers say

### Infrared Temp

[App page](https://appshunter.io/ios/app/infrared-temp/id924300241)

Measure temperature using an infrared module connected to your phone. This app works with a specific infrared temperature module (TMS) that plugs into your phone's jack to display readings.

**Highlights:** Infrared temperature measurement, Works with TMS module, Connects via phone jack, Displays temperature readings

**Features:** macOS Compatibility

**In-app purchases:** none


### Sutro

[App page](https://appshunter.io/ios/app/sutro/id1439627399)

Effortlessly manage your pool or spa water quality. This app works with a smart monitor to automatically track pH, free chlorine, alkalinity, and temperature, providing insights that make sense for optimal water conditions.

**Highlights:** Automatic water quality monitoring, pH tracking, Free chlorine measurement, Alkalinity tracking, Temperature monitoring, Seamless app integration

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Accurate water testing
- 💡 Helpful notifications and recommendations
- 🔒 Reliable customer support
- 🚀 Convenient pool monitoring

**What reviewers complain about**

- 🐛 Connectivity issues
- 🐛 Inaccurate readings
- 🐛 Buggy app performance
- 🔋 Expensive subscription
- 🐛 Setup difficulties

**Reported bugs**

- App crashes and freezes
- Disconnection issues with hub
- Calibration failures
- Inaccurate water chemistry readings

**Requested features**

- Measure total hardness and CYA
- Customizable notification settings
- Ability to cancel subscription easily
- Improved app stability and user experience


## Frequently asked questions

### Is Infrared Temp free?

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

### Is Sutro free?

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

### Which has better reviews, Infrared Temp or Sutro?

Sutro is rated higher. Infrared Temp averages 1.3 out of 5 from 53 ratings, while Sutro averages 3.9 from 175 ratings.

### Do Infrared Temp or Sutro have ads?

Neither Infrared Temp nor Sutro shows ads.

### Which is updated more often, Infrared Temp or Sutro?

Infrared Temp ships an update every 4 months, and Sutro every 2 months. Most recently, Infrared Temp was updated on October 21, 2026 and Sutro on October 15, 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.*