ICO vs Sutro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ICO
This application helps you maintain optimal water quality in your pool or spa. It provides personalized guidance for chemical dosing and best practices to ensure a healthier swimming experience and protect your equipment. Monitor your water quality conveniently from anywhere, anytime.
- Measures critical water parameters
- Promotes healthier, cleaner water
- Personalized chemical dosing guidance
- Protects pool equipment
- Provides best swimming experience
- Accessible from anywhere, anytime
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At Ondilo we know that mastering the water in a pool or spa is an art. That's why we created ICO. Constantly measuring critical water parameters, ICO promotes healthier, cleaner water, to protect pool equipment and provide best swimming experience. Proposing personalized guidance for chemical dosing and best practices to save money, protect swimmers and the environment. Accessible from anywhere, anytime, ICO provides a convenient, easy way to keep an eye on your pool water quality at all times. So that you spend more time enjoying your pool ! ICO, and it all becomes crystal-clear Find out more about ICO's functionalities on www.ondilo.com A ICO connected device is necessary to take full advantage of this application.
Sutro
This app connects multiple pool and spa monitoring devices to a single interface. It allows users to manage and view the status of all their connected Sutro devices from one convenient location.
- Connect multiple Sutro devices
- Centralized device management
- View device status
- Route management for devices
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The SutroPro app connects all Sutros in your route into one.
Screenshots
Verdict
The clearest difference is review sentiment: ICO at 46% against Sutro's 0%. ICO also leads on rating (4.4 vs 3.2) and update cadence (every 5 weeks vs every 8 months). Sutro's advantage is iOS requirement (12.0 vs 14.0). 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.
ICO holds the better App Store score, 4.4 against 3.2. That said, the two scores are not equally well evidenced: ICO has 140 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 46% of ICO's written reviews are positive against 0% of Sutro's.
ICO ships an update every 5 weeks, Sutro every 8 months. The most recent releases landed on October 26, 2026 and October 6, 2026 respectively.
| Parameter | ICO | Sutro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (140 ratings) — better | 3.2 (11 ratings) |
| Positive reviews | 45.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 140 — better | 11 |
| Update frequency | Every 5 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 78 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | ONDILO | Sutro Connect Inc |
Customer experience
ICO
Sutro
In-app purchases
ICO
No in-app purchases
Sutro
No in-app purchases
