IdematLightLCA vs Lumize
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
IdematLightLCA
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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) βat your fingertipβ. 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.
Lumize
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Learning, without studying. Lumize turns what you want to learn into notifications on your lock screen: a Spanish word, a capital, a chemical element, a quote you want to live by. Lumes arrive throughout your day, at times you choose, so the moments you already spend on your phone become learning. Make your own collections, let AI build one on any topic, or start with a ready-made one from the Vault. LEARN FROM YOUR LOCK SCREEN Pick a collection, then choose how often and between which hours. Your lumes show up all day, and tapping one opens it in the app. Nothing to plan and no sessions to sit through: you learn effortlessly while you go about your day. CREATE ANYTHING YOU WANT TO LEARN Type what you want to learn, like "Spanish for my trip" or "the planets", and AI builds the collection for you. Or add lumes yourself, translate a collection or pull the vocabulary out of any text. Japanese, Chinese, Korean and more come with pronunciation in Latin letters. START WITH THE VAULT Import ready-made collections, from language courses to capitals, flags and the elements of the periodic table, plus facts worth knowing and mindset collections. Once imported, a collection is yours to change. PUT YOUR MEMORY TO THE TEST Once a lume has reached you four times, it's ready for recall. Type the answer from memory, ask for a hint when you need one, and watch what you know move to your archive. Included in Lumize Gold. LEARN AS YOU LISTEN Turn any collection into an audio session with spoken lumes and music. Ideal for your commute, a walk or the gym. Included in Lumize Gold. BUILD YOUR DAILY LINEUP Mix up to 8 collections into one schedule, so words, facts and mindset reminders take turns throughout your day. Included in Lumize Gold. SHARPEN YOUR MINDSET Keep the quotes, principles and reminders that matter to you close, and write down your reflections along the way. Your reflections stay private. LEARN TOGETHER Share a collection with friends, classmates or family. Let them follow your updates, build it together with you, or give them a copy of their own. LUMIZE GOLD Gold unlocks recall, audio sessions, your daily lineup, smarter AI lumes and colorful skies. Lumize offers an optional auto-renewing subscription for additional features. The price and billing period are shown before purchase. Payment is charged to your Apple Account. Your subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple Account settings. Terms of use: https://lumize.app/terms-of-use Privacy policy: https://lumize.app/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: IdematLightLCA at none against Lumize's 1. IdematLightLCA also leads on device support (3 vs 1). Lumize's advantage is update cadence (every 4 days vs every 2 months). On price, ads and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Lumize sells 1 in-app purchase, starting at $4.99 per month. IdematLightLCA asks for nothing beyond the download.
IdematLightLCA ships an update every 2 months, Lumize every 4 days. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.
| Parameter | IdematLightLCA | Lumize |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 4 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.0 β better | 16.4 |
| Further details β not scored | ||
| Size | 27 MB | 82 MB |
| Age rating | 4+ | 4+ |
| Developer | joost vogtlander | Lumize |
In-app purchases
IdematLightLCA
No in-app purchases
Lumize
- Lumize Gold$4.991 Month









