knowLedge vs when
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
knowLedge
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knowLedge knowLedge is a learning tool which helps you in improving your knowledge in the easiest possible way. All you have to do is start playing and answer the questions. Choose the answers from the choices and the app will respond whether it is the right answer. If it is not, it educates you the right answer. The app will keep asking you the question at the right interval until you are familiar with that. It also increases the complexity as you progress until you completely master it. You can track overall progress at any time in app and today's progress in widget. As of now, the app covers general knowledge about the USA.
when
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"ๅๆฌกๅ ๅนด่กจ" is a project where users collaborate to build a database that encompasses all historical events, from the origins of the universe to the endless "now", regardless of the field. It aims to accurately display both temporal and spatial distances by making "where" as important as "when".
Screenshots
Verdict
The clearest difference is update cadence: when at every 3 weeks against knowLedge's every 85 months. when also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
knowLedge ships an update every 85 months, when every 3 weeks. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.
| Parameter | knowLedge | when |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 85 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 28 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Mallow Technologies Private Limited | Hiroe Oshimura |
In-app purchases
knowLedge
No in-app purchases
when
No in-app purchases
Questions
Is knowLedge free?
Is when free?
Do knowLedge or when have ads?
Which is updated more often, knowLedge or when?
Other comparisons
