Infrared Temp vs Sutro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Infrared Temp
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.
- Infrared temperature measurement
- Works with TMS module
- Connects via phone jack
- Displays temperature readings
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This APP is an infrared application of temperature measurement, it must be used with an infrared temperature module TMS(please refer to http://www.radiantek.com.tw/products/tms.asp). TMS with phone jack plug can be connected with the phone jack of iPhone , and then use the APP to take temperature.
Sutro
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.
- Automatic water quality monitoring
- pH tracking
- Free chlorine measurement
- Alkalinity tracking
- Temperature monitoring
- Seamless app integration
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Sutro is the simple, safe, and seamless way to manage your Pool (or Spa) water with measurements that make sense and monitoring that is automatic. The Sutro app works with the Sutro Smart Monitor to measure your pool or spa’s pH, free chlorine (ppm), alkalinity, and temperature without you having to do anything.
Screenshots
Verdict
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.
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. 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.
| Parameter | Infrared Temp | Sutro |
|---|---|---|
| Price | Free | Free |
| Rating | 1.3 (53 ratings) | 3.9 (175 ratings) — better |
| Positive reviews | 0.0% of reviews | 72.9% of reviews — better |
| Number of ratings | 53 | 175 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 12.4 |
| Further details — not scored | ||
| Size | 36 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | RADIANT INNOVATION INC. | Sutro Connect Inc |
Customer experience
Infrared Temp
Sutro
Bugs and requests
Infrared Temp
Not enough reviews yet to summarise bugs or requests.
Sutro
Reported bugs
4 issues- App crashes and freezes
- Disconnection issues with hub
- Calibration failures
- Inaccurate water chemistry readings
Requested features
4 requests- Measure total hardness and CYA
- Customizable notification settings
- Ability to cancel subscription easily
- Improved app stability and user experience
In-app purchases
Infrared Temp
No in-app purchases
Sutro
No in-app purchases
