Leader
64%of answers name it
The most visible book summary apps, October 2026
Most cited source
33citations
From Google AI Mode, Gemini, Google AI Overviews and ChatGPT
Where engines disagree most
2/4engines put it in their top three
Top three on Google AI Mode and Google AI Overviews, not on Gemini and ChatGPT
Brands
| Rank | Brand | Rank change | Heralded Score | Score trend | Mentioned | Recommended | By engine | Mentioned by | Change |
|---|---|---|---|---|---|---|---|---|---|
| – | | Unranked | Too few answers | –
| 0% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 1% | 0% | None | First reading | |
| – | Heardly | Unranked | Too few answers | –
| 1% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 0% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 4% | 3% | | First reading | |
| – | | Unranked | Too few answers | –
| 1% | 1% | None | First reading | |
| – | | Unranked | Too few answers | –
| 0% | 0% | None | First reading | |
| – | Read Stacks | Unranked | Too few answers | –
| 2% | 2% | None | First reading | |
| – | Readfiy | Unranked | Too few answers | –
| 1% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 0% | 0% | None | First reading |
“=” marks brands whose score ranges overlap, so the test cannot separate them. Every brand named in at least three answers is ranked. By engine has one dot per engine (ChatGPT, Google AI Overviews, Gemini and Google AI Mode), darker the more often it names the brand.
This month's moves
First reading. No comparable previous month yet.
Biggest risers
No clear rise.
Biggest fallers
No clear fall.
New entries
Drop-outs
No drop-outs.
Most cited sources
| Rank | Source | Type | Cited in | Engines | Pages cited | Brands its pages mention |
|---|---|---|---|---|---|---|
| 11 | Withheld. Run a full Snapshot to see it. | |||||
| 12 | | Brand site | 6.9% | 3 of 4 | 4 | Not read |
| 13 | | Reference | 5.6% | 1 of 4 | 1 | 0 |
| 14 | | Consultancy | 2.8% | 1 of 4 | 3 | 0 |
| 15 | | Regulator | 2.8% | 1 of 4 | 4 | Not read |
| 16 | Withheld. Run a full Snapshot to see it. | |||||
| 17 | Withheld. Run a full Snapshot to see it. | |||||
| 18 | | Media | 4.2% | 2 of 4 | 3 | 3 |
| 19 | Withheld. Run a full Snapshot to see it. | |||||
| 20 | Withheld. Run a full Snapshot to see it. | |||||
The questions, and who wins each
| Question | Language | Wins it |
|---|---|---|
| one book summary app or separate sources for business and self-help books? | English | |
| how can i get the main ideas from books without reading each one? | English | |
| i manage a team and need quick summaries of books on leadership | English | No brand recommended |
| i commute every day and want to learn from audio book summaries | English | |
| i am a student with limited time and need the key ideas from nonfiction books | English | |
Each engine's top three
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Method
Each month Heralded asks every engine the same buyer questions, twice each, and reads every answer. An answer counts 0 for a brand it leaves out, 50 for a brand it names and 100 for a brand it recommends, and the Heralded Score is built from those. A brand named in at least three answers gets a score and a place.