myHarkness Calculator vs KDM Reader
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.
KDM Reader
Easily verify KDM validity times, content version, and target DCP player. View information in your local timezone or UTC.
- Verify KDM validity times
- Check content version
- Identify target DCP player
- View in local timezone
- View in UTC
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The Center Point Post KDM reader allows for easy access to confidently verify KDM validity times, content version, and target DCP player in both your local timezone as well as UTC.
Screenshots
Verdict
The clearest difference is update cadence: KDM Reader at every 3 weeks against myHarkness Calculator's every 3 months. myHarkness Calculator's advantage is iOS requirement (11.0 vs 16.0). 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.
myHarkness Calculator ships an update every 3 months, KDM Reader every 3 weeks. The most recent releases landed on September 20, 2026 and June 5, 2026 respectively.
| Parameter | myHarkness Calculator | KDM Reader |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, Mac |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 79 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Harkness Screens Ltd | Center Point Post |
In-app purchases
myHarkness Calculator
No in-app purchases
KDM Reader
No in-app purchases
Questions
Is myHarkness Calculator free?
Is KDM Reader free?
Do myHarkness Calculator or KDM Reader have ads?
Which is updated more often, myHarkness Calculator or KDM Reader?
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