# ICO vs Sutro

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.

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.

## The numbers

| Metric | ICO | Sutro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (140 ratings)](https://appshunter.io/ios/app/ico-smart-poolspa-partner/id1132611479/reviews)** | [3.2 (11 ratings)](https://appshunter.io/ios/app/sutro-pro/id1552389685/reviews) |
| Number of ratings | **140** | 11 |
| Positive reviews | **45.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 8 months |
| Monetization | Free | Free |
| Size | 78 MB | 65 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ONDILO](https://appshunter.io/developer/1132611478) | [Sutro Connect Inc](https://appshunter.io/developer/1439627398) |

## What reviewers say

### ICO

[App page](https://appshunter.io/ios/app/ico-smart-poolspa-partner/id1132611479)

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.

**Highlights:** Measures critical water parameters, Promotes healthier, cleaner water, Personalized chemical dosing guidance, Protects pool equipment, Provides best swimming experience, Accessible from anywhere, anytime

**Features:** macOS Compatibility

**In-app purchases:** none


### Sutro

[App page](https://appshunter.io/ios/app/sutro-pro/id1552389685)

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.

**Highlights:** Connect multiple Sutro devices, Centralized device management, View device status, Route management for devices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ICO free?

ICO 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, ICO or Sutro?

ICO is rated higher. ICO averages 4.4 out of 5 from 140 ratings, while Sutro averages 3.2 from 11 ratings.

### Do ICO or Sutro have ads?

Neither ICO nor Sutro shows ads.

### Which is updated more often, ICO or Sutro?

ICO ships an update every 5 weeks, and Sutro every 8 months. Most recently, ICO was updated on October 26, 2026 and Sutro on October 6, 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.*