# SolidGuide vs InsideWater

The clearest difference is device support: SolidGuide at 3 against InsideWater's —. InsideWater's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence and in-app purchases there is nothing between them.

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

SolidGuide ships an update every 6 weeks, InsideWater every 3 months. The most recent releases landed on October 5, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | SolidGuide | InsideWater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/solidguide/id1522550825/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 3 MB | 31 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [APTech Group](https://appshunter.io/developer/1009293142) | [AQUA SPA](https://appshunter.io/developer/1610112085) |

## What reviewers say

### SolidGuide

[App page](https://appshunter.io/ios/app/solidguide/id1522550825)

This app provides water treatment professionals with quick access to product information and essential calculators for cooling tower, boiler, and closed-loop systems. It features a user-friendly catalog, equipment details, intelligent surveys, and searchable resources like spec sheets and drawings.

**Highlights:** User-friendly product catalog, Comprehensive equipment information, Intelligent surveys, Upgraded calculators, Searchable resources (spec sheets, drawings, case studies)

**Features:** macOS Compatibility

**In-app purchases:** none


### InsideWater

[App page](https://appshunter.io/ios/app/insidewater/id6446782142)

**In-app purchases:** none


## Frequently asked questions

### Is SolidGuide free?

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

### Is InsideWater free?

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

### Which is updated more often, SolidGuide or InsideWater?

SolidGuide ships an update every 6 weeks, and InsideWater every 3 months. Most recently, SolidGuide was updated on October 5, 2026 and InsideWater on September 29, 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.*