WaterGuru vs Sutro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WaterGuru
This app provides comprehensive control over your pool's water chemistry. It helps maintain a safe environment by keeping out harmful contaminants and offers lab-grade analysis and treatment advice for simplified pool management.
- Pool water chemistry control
- Harmful virus and bacteria prevention
- Lab-grade analysis
- Water treatment advice
- Simplified pool management
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Get ultimate control over your pool water chemistry with WaterGuru. Keep harmful viruses and bacteria out and simplify how you manage your pool forever. Rebuilt from the ground up, the next generation app includes all features you love and more, including lab grade analysis and water treatment advice.
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: WaterGuru at 74% against Sutro's 0%. WaterGuru also leads on rating (4.1 vs 3.2) and update cadence (every 4 weeks vs every 8 months). Sutro's advantage is iOS requirement (12.0 vs 15.0). 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.
WaterGuru holds the better App Store score, 4.1 against 3.2. That said, the two scores are not equally well evidenced: WaterGuru has 239 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 74% of WaterGuru's written reviews are positive against 0% of Sutro's.
WaterGuru ships an update every 4 weeks, Sutro every 8 months. The most recent releases landed on October 25, 2026 and October 6, 2026 respectively.
| Parameter | WaterGuru | Sutro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (239 ratings) — better | 3.2 (11 ratings) |
| Positive reviews | 73.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 239 — better | 11 |
| Update frequency | Every 4 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 155 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | WaterGuru, Inc | Sutro Connect Inc |
Customer experience
WaterGuru
Sutro
Bugs and requests
WaterGuru
Reported bugs
3 issues- App notifications not working properly
- Inability to upload pool photos
- Inconsistent app performance after updates
Requested features
4 requests- Ability to set custom testing schedule
- Measure salt levels
- Provide more advice on adjusting water chemistry
- Add hourly temperature readings
Sutro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
WaterGuru
No in-app purchases
Sutro
No in-app purchases
