Valve vs Dry Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Valve
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.
- Calculates KV values
- Displays valve and actuator ranges
- Saves selected combinations
- Shares combinations via email
- Browse all available options
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Valve ruler is a selection tool, which helps you choose the right combination. Valve ruler app is a selection tool, which will help you choose and connect the right valve and actuator for your application. You can input or calculate KV, select application type, valve connection, ports and PN for your application or simply just browse all and find the best solution for you. After you have selected your combination you can save it in the app or send it via email. Features: - Calculates KV - Shows range of valves - Shows range of actuators for selected valve - Share combination - Save combination Valve ruler enables you to calculate your KV by entering your flow (Q) and your inlet and outlet pressure. After selecting the application type you are searching for and valve connection, you can also choose between 2 or 3 ports and select your PN. If you don’t have this data, you just click browse and valve ruler will give you all the options available. After finding the right valve, you can select the actuator which combines with selected valve the actuator’s version. When your selection is completed, you can either save it or share it via email. When browsing, you can move the ruler right or left, to find the right KVs and DN for your valve and also always calculate your KV by clicking on pencil in the top. Or delete it without returning to selection screen, by clicking on x on the top. In settings, you can change your language, update the app, see instructions or view saved.
Dry Tools
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.
- Air Stream Mixing Calculator
- HVAC Formulas
- Lead Time Wheel
- Psychrometric Calculator
- Integrated Weather Data
- Educational Content
- Industry Glossary
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Dry Tools by CDI contains multiple tools to calculate Air Stream Mixing, HVAC formulas, Lead Times, as well as a Psychrometric calculator with integrated weather data for HVAC professionals and students. The app is designed to be your first step to calculating the conditions you need to achieve your critical mission. Key Features: Tools • Air Stream Mixing: Solve for mixed air conditions from any two airstreams . • HVAC Formulas: Handy, commonly used formulas where moisture in air is concerned. • Lead Time Wheel: Helpful tool for planning project lead times. • Psychrometric Calculator: Enter any two data points and get all the others. • Weather Data: GPS locator or search for ambient weather conditions worldwide. Education • Dr. Dry Talks: From relative humidity to vapor pressure, easy learning with dry humor. • Glossary: Not so common, commonly used terms in our industry. Products • Air Handling • Desiccant Dehumidification • Service More • Contact Us • About Us • To Our Competition In summary, Dry Tools will provide you with the tools you need in one handy app. Install the free App and get started on your psychrometric journey.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Valve | Dry Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 9 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 17 MB | 45 MB |
| Age rating | 4+ | 12+ |
| Developer | Danfoss A/S | CLIMATE BY DESIGN INTERNATIONAL, INC. |
Customer experience
Valve
Dry Tools
In-app purchases
Valve
No in-app purchases
Dry Tools
No in-app purchases







