entanglement entropy vs Quantum Retriever
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
entanglement entropy
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This app represents entanglement entropy for a pure bipartite state of the composite system. The entanglement entropy is von Neumann entropy for the reduced density matrix.
Quantum Retriever
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Not all AIs work the same. With Quantum Retriever, you can search and compare their results. You can compare their answers, to see where they agree and where they don't. You can synthesize their results for more full answers. You can also evaluate specific models head to head, including many open source and experimental models. You can see how they rank on speed, token count, math and logic interpretation, and more. All your queries are only saved locally on your device, and are not shared with anyone outside this app.
Screenshots
Verdict
The clearest difference is iOS requirement: Quantum Retriever at 15.1 against entanglement entropy's 18.0. 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.
| Parameter | entanglement entropy | Quantum Retriever |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 9 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 5 MB | 27 MB |
| Age rating | 4+ | 12+ |
| Developer | Sungjun Kim | James Beach |
In-app purchases
entanglement entropy
No in-app purchases
Quantum Retriever
No in-app purchases
Questions
Is entanglement entropy free?
Is Quantum Retriever free?
Do entanglement entropy or Quantum Retriever have ads?
Other comparisons
