Open as App vs IHWAP Diagnostics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open as App
Transform spreadsheets into powerful, customizable mobile and web apps for teams. Digitize processes, improve speed, and reduce errors with a no-code solution. Build and share apps instantly, working offline and in real-time across platforms.
- Spreadsheet to app conversion
- No-code app builder
- Offline app access
- Real-time collaboration
- Customizable app templates
- Cross-platform compatibility
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Open as App enables teams to turn spreadsheets into powerful, customizable apps they can Open as App enables teams to turn spreadsheets into powerful, customizable apps they can use on the go, even offline. Depending on your business needs, you can now digitize processes, work much faster, avoid human errors, and much more without investing in development. Through our no-code solution, you built your app yourself. It's easy. All you need is Excel, Google Sheets, or other databases that serve as your app's base. Upload your file or use a template. Open as App will recognize the logic and creates your app automatically. Once you are finished, you publish your app, share it, and work with it in real time on any platform. Whether you work in Finance, Manufacturing, Health, Education, Insurance, Management, or other, you can create service quotes through your apps and have them signed on the spot, invoices on-site, pricing plans, product catalogs, dashboards, budget reports, finance reports, company performance, contact lists, inventory lists, project lists, time-tracking, recording of billable hours, customer surveys and more. Start building incredible mobile and web calculators, dashboards, lists, and surveys now!Start building incredible mobile and web calculators, dashboards, lists, and surveys now!
IHWAP Diagnostics
This application assists with home weatherization by quantifying air leakage, calculating ventilation needs, and assessing duct system pressure against program standards. It helps prioritize air sealing and ensures compliance with energy efficiency guidelines.
- Zone Pressure Diagnostics (ZPD)
- Total External Static Pressure (TESP) calculation
- ASHRAE ventilation requirements
- Leakage reduction potential estimation
- ENERGY STAR compliance checks
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Illinois Home Weatherization Assistance Program (IHWAP) Diagnostics application for the University of Illinois. This app is the product of a collaboration between the Indoor Climate Research & Training Center’s Senior Weatherization Trainer, Nate Price, and me. The Zone Pressure Diagnostics (ZPD) function will quantify the connection between the house and a zone and between that zone and the outdoors. It will also estimate the total leakage reduction potential in the zone, which should assist with prioritizing air sealing measures. The Total External Static Pressure (TESP) function will calculate total pressure and the pressure caused by the various components of a duct system and compare them to Illinois Home Weatherization Assistance Program (IHWAP) standards for recommended replacement options. The American Society of Heating and Air-Conditioning Engineers (ASHRAE) function will calculate home ventilation requirements ensuring proper pollutant control and ENERGY STAR compliance.
Screenshots
Verdict
The clearest difference is rating: IHWAP Diagnostics at 5.0 against Open as App's 4.3. IHWAP Diagnostics also leads on monetization model (free vs freemium) and review sentiment (100% vs 78%). Open as App's advantage is update cadence (every 5 weeks vs every 5 months) and ratings volume (37 vs 5). On price, ads, in-app purchases and device support 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.
IHWAP Diagnostics holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Open as App has 37 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 78% of Open as App's written reviews are positive against 100% of IHWAP Diagnostics's.
Open as App ships an update every 5 weeks, IHWAP Diagnostics every 5 months. The most recent releases landed on June 11, 2026 and June 5, 2026 respectively.
| Parameter | Open as App | IHWAP Diagnostics |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (37 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 77.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 37 — better | 5 |
| Update frequency | Every 5 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 145 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Open as App GmbH | Travis Jenkins |
Customer experience
Open as App
IHWAP Diagnostics
In-app purchases
Open as App
No in-app purchases
IHWAP Diagnostics
No in-app purchases
Questions
Is Open as App free?
Is IHWAP Diagnostics free?
Which has better reviews, Open as App or IHWAP Diagnostics?
Do Open as App or IHWAP Diagnostics have ads?
Which is updated more often, Open as App or IHWAP Diagnostics?
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