# IIAR vs Dry Tools

The clearest difference is review sentiment: Dry Tools at 100% against IIAR's 50%. Dry Tools also leads on rating (5.0 vs 4.5) and iOS requirement (11.0 vs 13.0). On price, ratings volume, update cadence and ads 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 4.5. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 50% of IIAR's written reviews are positive against 100% of Dry Tools's.

IIAR ships an update every 4 months, Dry Tools every 6 months. The most recent releases landed on July 4, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | IIAR | Dry Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/iiar/id1080343135/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/dry-tools/id1462240541/reviews)** |
| Number of ratings | 4 | **5** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 37 MB | 45 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [International Institute of Ammonia Refrigeration](https://appshunter.io/developer/1080343134) | [CLIMATE BY DESIGN INTERNATIONAL, INC.](https://appshunter.io/developer/1462240540) |

## What reviewers say

### IIAR

[App page](https://appshunter.io/ios/app/iiar/id1080343135)

This app provides members of the natural refrigeration community with advocacy, education, and technical information. It offers features for managing profiles, accessing conference resources, connecting with others, and staying updated on industry news.

**Highlights:** Profile management, Conference resource access, Session note-taking, Speaker and exhibitor browsing, Industry news updates, Social media integration, Member directory access

**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 IIAR free?

IIAR 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, IIAR or Dry Tools?

Dry Tools is rated higher. IIAR averages 4.5 out of 5 from 4 ratings, while Dry Tools averages 5.0 from 5 ratings.

### Do IIAR or Dry Tools have ads?

Neither IIAR nor Dry Tools shows ads.

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

IIAR ships an update every 4 months, and Dry Tools every 6 months. Most recently, IIAR was updated on July 4, 2026 and Dry Tools on June 11, 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.*