Comparison

Open as App vs IHWAP Diagnostics

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Spreadsheet to app conversion
  • No-code app builder
  • Offline app access
  • Real-time collaboration
  • Customizable app templates
  • Cross-platform compatibility
Features
Read full description

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!

About

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.

Highlights
  • Zone Pressure Diagnostics (ZPD)
  • Total External Static Pressure (TESP) calculation
  • ASHRAE ventilation requirements
  • Leakage reduction potential estimation
  • ENERGY STAR compliance checks
Features
Read full description

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

Open as App4 screens
IHWAP Diagnostics4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Open as App versus IHWAP Diagnostics: the parameters behind the verdict, then further details
ParameterOpen as AppIHWAP Diagnostics
PriceFreeFree
Rating4.3 (37 ratings)5.0 (5 ratings) — better
Positive reviews77.8% of reviews100.0% of reviews — better
Number of ratings37 — better5
Update frequencyEvery 5 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better16.0
Further details — not scored
Size145 MB75 MB
Age rating4+4+
DeveloperOpen as App GmbHTravis Jenkins

Customer experience

Open as App

All ratings37 ratings
Positive83.8%
Neutral0.0%
Negative16.2%
Written reviews36 reviews
Positive77.8%
Neutral2.8%
Negative19.4%

IHWAP Diagnostics

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Open as App

No in-app purchases

None

IHWAP Diagnostics

No in-app purchases

Questions

Is Open as App free?
Open as App is free to download, with no in-app purchases.
Is IHWAP Diagnostics free?
IHWAP Diagnostics is free to download, with no in-app purchases.
Which has better reviews, Open as App or IHWAP Diagnostics?
IHWAP Diagnostics is rated higher. Open as App averages 4.3 out of 5 from 37 ratings, while IHWAP Diagnostics averages 5.0 from 5 ratings.
Do Open as App or IHWAP Diagnostics have ads?
Neither Open as App nor IHWAP Diagnostics shows ads.
Which is updated more often, Open as App or IHWAP Diagnostics?
Open as App ships an update every 5 weeks, and IHWAP Diagnostics every 5 months. Most recently, Open as App was updated on June 11, 2026 and IHWAP Diagnostics on June 5, 2026.

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