myHarkness Calculator vs Diamond ECL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
myHarkness Calculator
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Part of the myHarkness platform, the myHarkness Calculator allows engineers and exhibitors to ensure that digital cinema investments are fully optimised. Quick and easy to use, the tool identifies the capabilities of equipment choices and provides recommendations on projector, light source and screen choices based upon chosen screen size and maximum brightness levels for 2D and 3D. It also calculates theoretical operating costs and shows how screen choice might reduce these dramatically. The myHarkness Calculator has been rigorously tested to confirm its accuracy. The tool however is dependent on the accuracy of data entered by the user which is then used to make a number of assumptions. Whilst the results displayed in the Calculator are theoretically possible there are any number of variables which could alter the outcome significantly. Harkness Screens always recommends users consult with Harkness before applying the information supplied in the myHarkness Calculator in to real-world construction projects.
Diamond ECL
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This is an electronic checklists app for Diamond Da-40/42NG aircraft.
Screenshots
Verdict
The clearest difference is price: myHarkness Calculator at Free against Diamond ECL's $1.99. myHarkness Calculator also leads on iOS requirement (11.0 vs 17). On update cadence, 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
myHarkness Calculator is free to download; Diamond ECL costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
myHarkness Calculator ships an update every 3 months, Diamond ECL every 2 months. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.
| Parameter | myHarkness Calculator | Diamond ECL |
|---|---|---|
| Price | Free — better | $1.99 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17 |
| Further details — not scored | ||
| Size | 79 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Harkness Screens Ltd | Gadir Mamedov |
In-app purchases
myHarkness Calculator
No in-app purchases
Diamond ECL
No in-app purchases
Questions
Is myHarkness Calculator free?
Is Diamond ECL free?
Do myHarkness Calculator or Diamond ECL have ads?
Which is updated more often, myHarkness Calculator or Diamond ECL?
Other comparisons
