Leader
54%of answers name it
The most visible book summary apps on ChatGPT, October 2026
Most cited source
20citations
From ChatGPT
Where engines disagree most
One engine
This page reads ChatGPT only. Set Engine to All to compare them.
Brands
| Rank | Brand | Heralded Score | Mentioned | Recommended | By engine | Mentioned by | Change |
|---|---|---|---|---|---|---|---|
| 1 | | 71 , range 45–84 | 54% | 54% | | First reading | |
| 2 | | 62 , range 40–80 | 50% | 43% | None | First reading | |
| 3 | | 48 , range 33–74 | 43% | 29% | None | First reading | |
| 4 | | 39 , range 25–64 | 36% | 14% | | First reading | |
| 5 | | 21 , range 11–43 | 18% | 0% | None | First reading | |
| – | | Too few answers | 0% | 0% | None | First reading | |
| – | 2 Minute Readers | Too few answers | 7% | 7% | None | First reading | |
| – | | Too few answers | 7% | 7% | None | First reading | |
| – | Concise Reading | Too few answers | 0% | 0% | None | First reading | |
| – | | 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.
Most cited sources
| Rank | Source | Type | Cited in | Engines | Pages cited | Brands its pages mention |
|---|---|---|---|---|---|---|
| 1 | | Brand site | 40.0% | 1 of 4 | 9 | 2 |
| 2 | | Brand site | 40.0% | 1 of 4 | 5 | Not read |
| 3 | Withheld. Run a full Snapshot to see it. | |||||
| 4 | | Reference | 20.0% | 1 of 4 | 1 | 0 |
| 5 | | Consultancy | 10.0% | 1 of 4 | 3 | 0 |
| 6 | | Regulator | 10.0% | 1 of 4 | 4 | Not read |
| 7 | Withheld. Run a full Snapshot to see it. | |||||
| 8 | Withheld. Run a full Snapshot to see it. | |||||
| 9 | Withheld. Run a full Snapshot to see it. | |||||
| 10 | Withheld. Run a full Snapshot to see it. | |||||
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 | No brand recommended |
| 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 | No brand recommended |
| 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 | 2 Minute Readers, |
| how can i explore a book's main ideas before reading the whole thing? | English | No brand recommended |
| 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.