kitio.aiOmphalis vs What Book Is This
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. What Book Is This is completely free, while Omphalis is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Inline explanations
- Questions across sources
- Notes linked to source text
- Generated narration
- Courses from documents
- Search by description
- Search by plot
- Search by quote
- Match explanations
- English, Chinese and French
| Feature | Omphalis | What Book Is This |
|---|---|---|
| Best for | Reading workspace that explains articles, PDFs, videos and podcasts | Identifies a forgotten book from a plot, character or quote |
| Category | Research & search | Research & search |
| Pricing model | Freemium | Free |
| Starting price | $9/mo | Free |
| Free plan | Yes | Yes, fully free |
| Made by | Omphalis | What Book Is This |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
What Book Is This is completely free, while Omphalis is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- 100 units a month
- 2 GB storage
- 100 subscribed sources
Pro
$9/mo
- 300 units a month
- 25 GB storage
- Key moments recap
- Build courses
Premium
$19/mo
- 600 units a month
- 50 GB storage
- 200 voice minutes
Scholar
$39/mo
- 1,200 units a month
- 100 GB storage
- 400 voice minutes
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Omphalis
- Handles text, video and podcasts
- Library export at any time
- Works inside ChatGPT
- Usage measured in units that run out
- Voice features only on higher plans
- Free plan suits light reading only
What Book Is This
- Works from vague memories
- Explains why each book matches
- No sign-up needed to search
- Single-purpose tool
- Obscure books may not be found
- Results depend on how much you remember
Which one should you choose?
Choose Omphalis if you want:
- Handles text, video and podcasts
- Library export at any time
- Works inside ChatGPT
Watch out: usage measured in units that run out.
Choose What Book Is This if you want:
- Works from vague memories
- Explains why each book matches
- No sign-up needed to search
Watch out: single-purpose tool.
Omphalis vs What Book Is This FAQ
What is the difference between Omphalis and What Book Is This?
Omphalis: Reading workspace that explains articles, PDFs, videos and podcasts. What Book Is This: Identifies a forgotten book from a plot, character or quote. Both are research & search tools.
Is Omphalis or What Book Is This cheaper?
What Book Is This is completely free, while Omphalis is freemium.
Do Omphalis and What Book Is This have free plans?
Omphalis: Yes. What Book Is This: Yes, fully free.
Who makes Omphalis?
Omphalis is made by Omphalis.
Who makes What Book Is This?
What Book Is This is made by What Book Is This.
Which should I choose, Omphalis or What Book Is This?
Choose Omphalis if you value handles text, video and podcasts and library export at any time. Choose What Book Is This if you value works from vague memories and explains why each book matches.