# Valve vs Dry Tools

The clearest difference is review sentiment: Dry Tools at 100% against Valve's 0%. Dry Tools also leads on rating (5.0 vs 1.0) and ratings volume (5 vs 1). Valve's advantage is iOS requirement (6.0 vs 11.0). 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.

Dry Tools holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Dry Tools has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Valve's written reviews are positive against 100% of Dry Tools's.

Valve ships an update every 9 months, Dry Tools every 6 months. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Valve | Dry Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/valve-ruler/id966127722/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/dry-tools/id1462240541/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 17 MB | 45 MB |
| Requires iOS | **6.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [CLIMATE BY DESIGN INTERNATIONAL, INC.](https://appshunter.io/developer/1462240540) |

## What reviewers say

### Valve

[App page](https://appshunter.io/ios/app/valve-ruler/id966127722)

This tool assists in selecting the correct valve and actuator for your specific application. It allows you to input or calculate KV values, choose connection types, and browse available options to find the best solution. Saved combinations can be stored within the app or shared via email.

**Highlights:** Calculates KV values, Displays valve and actuator ranges, Saves selected combinations, Shares combinations via email, Browse all available options

**Features:** macOS Compatibility

**In-app purchases:** none


### Dry Tools

[App page](https://appshunter.io/ios/app/dry-tools/id1462240541)

This app provides HVAC professionals and students with essential calculation tools, including air stream mixing, HVAC formulas, lead time planning, and a psychrometric calculator with weather data. It also offers educational content and industry-specific terminology.

**Highlights:** Air Stream Mixing Calculator, HVAC Formulas, Lead Time Wheel, Psychrometric Calculator, Integrated Weather Data, Educational Content, Industry Glossary

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Valve free?

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

### Is Dry Tools free?

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

### Which has better reviews, Valve or Dry Tools?

Dry Tools is rated higher. Valve averages 1.0 out of 5 from 1 ratings, while Dry Tools averages 5.0 from 5 ratings.

### Do Valve or Dry Tools have ads?

Neither Valve nor Dry Tools shows ads.

### Which is updated more often, Valve or Dry Tools?

Valve ships an update every 9 months, and Dry Tools every 6 months. Most recently, Valve was updated on October 21, 2026 and Dry Tools on October 13, 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.*