BookDaddy vs PenAI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BookDaddy
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BookDaddy.ai uses advanced AI to help you write, publish, and market your book—faster and easier than ever before. Whether you're a first-time author or an experienced writer, our tools guide you through the entire process, from draft to bestseller.
PenAI
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PenAI turns your ideas into complete ebooks — and lets you sell them, all from your phone. Type an idea, pick a tone and design theme, and PenAI's AI writes a full outline, chapters, and generates a matching cover. Publish to the built-in marketplace, set a price, and start earning. For authors: • AI-drafted chapters in your chosen tone • 4 curated design themes: Editorial, Modern, Vintage, Bold • AI-generated cover art matched to your theme • Publish with one tap, set your own price • Earnings dashboard shows every sale in real time For readers: • Browse and discover new ebooks in the marketplace • Read in-app or download as PDF • Buy as guest with just email — no account needed Fair economics. You keep 85% of every sale. Payouts direct to your bank via Stripe.
Screenshots
Verdict
The clearest difference is in-app purchases: BookDaddy at none against PenAI's 3. BookDaddy also leads on ads (none vs shown). PenAI's advantage is update cadence (daily vs fortnightly). On price, device support and iOS requirement 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. PenAI sells 3 one-off in-app purchases. BookDaddy asks for nothing beyond the download.
BookDaddy ships an update fortnightly, PenAI daily. The most recent releases landed on October 3, 2026 and September 29, 2026 respectively.
| Parameter | BookDaddy | PenAI |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 25 MB | 35 MB |
| Age rating | 4+ | 17+ |
| Developer | Deal.ai | Chijioke Oramadike |
In-app purchases
BookDaddy
No in-app purchases
PenAI
- 5 Credit Pack$4.99
- 20 Credit Pack$17.99
- 50 Credit Pack$39.99
