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 | –
| 2% | 0% | | First reading | |
| – | | Unranked | Too few answers | –
| 1% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 3% | 0% | None | First reading | |
| – | | Unranked | Too few answers | –
| 0% | 0% | | First reading | |
| – | | Unranked | Too few answers | –
| 0% | 0% | | First reading | |
| – | | Unranked | Too few answers | –
| 2% | 0% | | First reading | |
| – | | Unranked | Too few answers | –
| 1% | 0% | | First reading | |
| – | SummaryZ | Unranked | Too few answers | –
| 1% | 1% | | First reading | |
| – | | Unranked | Too few answers | –
| 1% | 0% | | 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 |
|---|---|---|---|---|---|---|
| 1 | | Brand site | 29.2% | 4 of 4 | 11 | 2 |
| 2 | | Brand site | 18.1% | 4 of 4 | 5 | Not read |
| 3 | | Vendor site | 15.3% | 3 of 4 | 7 | 3 |
| 4 | | Community | 15.3% | 3 of 4 | 10 | 1 |
| 5 | Withheld. Run a full Snapshot to see it. | |||||
| 6 | | Vendor site | 16.7% | 2 of 4 | 1 | 6 |
| 7 | | Community | 12.5% | 1 of 4 | 10 | 14 |
| 8 | Withheld. Run a full Snapshot to see it. | |||||
| 9 | | Vendor site | 5.6% | 1 of 4 | 8 | 7 |
| 10 | | Community | 6.9% | 1 of 4 | 7 | 3 |
The questions, and who wins each
| Question | Language | Wins it |
|---|---|---|
| what app can summarize nonfiction books for busy readers? | English | |
| which app helps me learn key ideas from business books quickly? | English | |
| how can i get useful book summaries on my phone? | English | |
| book summaries or audiobooks for learning during my commute? | English | |
| how can i learn from more books when i have little time to read? | English | |
| how do i remember the main ideas from books i finish? | English | No brand recommended |
| where can i find short summaries of books on leadership and business? | English | |
| how can i explore a book's main ideas before reading the whole thing? | English | |
| are short book summaries enough to learn, or should i read the full book? | English | No brand recommended |
| audio book summaries or written summaries for learning on the go? | 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.