IdematLightLCA vs Lieven de Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IdematLightLCA
Read full descriptionHide full description
The IdematLightLCA is an extension of the Idemat app for Sustainable Materials Selection, and offers the opportunity to make a Fast Track LCA for relative simple products (and services) ‘at your fingertip’. The background data are a selection of 720 processes from the Idematapp LCA database which is used at the Delft University of Technology. See for more information see www.ecocostsvalue.com/EVR/model/theory/8-IdematLightLCA.html. This app also enables the calculation of the eco-costs of a product with an Environmental Product Declaration, based on a set of EPD midpoints. The calculations are done for 3 end-of-life scenarios (Landfill; Municipal waste treatment & open loop recycling; Closed loop recycling for the circular economy). It shows clearly the benefits of the circular economy. The main application of the app is product innovation in the fuzzy front end of the design. Users are architects, industrial designers, business managers and students.
Lieven de Key
Access essential building information, including waste disposal, laundry facilities, and important contacts. Submit repair requests and use the app as a key for keyless apartments.
- Building information access
- Waste disposal guidelines
- Washing facility details
- Important contact numbers
- Repair request submission
- Keyless apartment entry
Read full descriptionHide full description
In Lieven de Key app you will find all practical information about the building where you are renting a home: from throwing away waste and washing facilities to important telephone numbers and submitting repair requests. Besides that you will be able to enter your building and room with the app if you rent a keyless apartment.
Screenshots
Verdict
The clearest difference is update cadence: IdematLightLCA at every 2 months against Lieven de Key's every 4 months. 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.
IdematLightLCA ships an update every 2 months, Lieven de Key every 4 months. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.
| Parameter | IdematLightLCA | Lieven de Key |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (3 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 27 MB | 64 MB |
| Age rating | 4+ | 4+ |
| Developer | joost vogtlander | GuestCompass |
In-app purchases
IdematLightLCA
No in-app purchases
Lieven de Key
No in-app purchases
Questions
Is IdematLightLCA free?
Is Lieven de Key free?
Do IdematLightLCA or Lieven de Key have ads?
Which is updated more often, IdematLightLCA or Lieven de Key?
Other comparisons
