# SolidGuide vs NV Master

The clearest difference is iOS requirement: NV Master at 12.0 against SolidGuide's 15.0. On price, update cadence, ads 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, NV Master every 3 weeks. The most recent releases landed on June 5, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | SolidGuide | NV Master |
| --- | --- | --- |
| 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 | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 46 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [APTech Group](https://appshunter.io/developer/1009293142) | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) |

## 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


### NV Master

[App page](https://appshunter.io/ios/app/nv-master/id6544784038)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SolidGuide free?

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

### Is NV Master free?

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

### Do SolidGuide or NV Master have ads?

Neither SolidGuide nor NV Master shows ads.

### Which is updated more often, SolidGuide or NV Master?

SolidGuide ships an update every 6 weeks, and NV Master every 3 weeks. Most recently, SolidGuide was updated on June 5, 2026 and NV Master on September 12, 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.*