Ghostreader AI vs Koham
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ghostreader AI
Read full descriptionHide full description
Ghostreader is the e-reader that reads with you. Bring books, papers, and articles into one private reading workspace, then ask questions, follow ideas, and return every answer to its source. READ WITH GHOST • Ask questions grounded in the text in front of you • Highlight a passage to explain it, define it, or ask a follow-up • Chat with one book, a selected set, or your whole library • Check cited source passages instead of taking an answer on faith • Listen with natural read-aloud while the page stays visible KEEP A PRIVATE READING MEMORY • Turn saved highlights, notes, and page-linked questions into inspectable ideas • See meaningful connections across books without turning reading progress into a public profile • Search what you kept and review a human-readable activity history BUILD IN BOOK STUDIO • Create cited comparisons, evidence tables, literature reviews, outlines, maps, briefs, and reading plans • Let Ghostreader find relevant passages automatically, or pin the exact passages you want • Revise artifacts without losing their source snapshot or version history READ WITH FRIENDS • Share one sourced page, note, or question with people you choose • Catch up through a finite Today table instead of an endless ranked feed • Read together in invite-only rooms with quiet, qualitative signals • Reply by branching from a passage in your own copy Friends is optional. Your library, private highlights, reading position, Reading Memory, and Studio work are not shared by default. You confirm the audience for every shared page. BRING YOUR OWN READING Import EPUB books, PDFs, Markdown files, research papers, and web articles. Switch supported originals between paged and continuous reading, and keep downloaded EPUB or PDF originals available for offline reading and search. AI explanations, sync, and newly generated work require a connection. Ghostreader includes a free Normie Reader plan with up to three new reading materials per month. Avid Reader is $6.99 per month and removes the monthly import limit. AI reading features are included on both plans. An account is required. Your library is private and is not used to train public AI models. Privacy Policy: https://ghostreader.ai/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Koham
Engage in deep conversations with your books using AI. Import your EPUBs and explore their content through interactive dialogue, fostering self-understanding. The app also features a calm EPUB reader and remembers your discussion history.
- AI-powered book conversations
- Import personal EPUB collections
- Real-time voice interaction
- EPUB reader with customization
- Discussion memory and editing
- API key configuration for AI
Read full descriptionHide full description
After you finish a book, how much of it actually stays with you? Koham offers a different path: talk to your books instead of merely reading them. Import a book. Start a conversation. Back and forth, unhurried, like a late-night walk or an intimate chat in a quiet study. Koham will not help you speed-read, nor will it help you memorize more. It does one thing: it lets you converse with your books through AI, so that in the exchange, you come to know yourself. When true understanding arrives, you never forget. What you seek, you already are. --- Core Experience • Talk to Books: Ask any book what truly matters to you. Every response is grounded in the text. • Realtime Voice: Like calling an old friend. Speak, listen, interrupt, or simply pause in silence. • Your Bookshelf: Import your personal collection. Every book feels like an old friend. • Calm Reading: A quiet EPUB reader. Customize fonts, themes, and brightness as you like. • Thought Continuity: It remembers past discussions so you can pick up next time. View, edit, or delete memories anytime. --- Please Note • Koham does not include books. Please import your own EPUB files. • AI conversations require configuring your own API key in Settings, with step-by-step guidance in the app.
Screenshots
Verdict
The clearest difference is update cadence: Koham at every 2 days against Ghostreader AI's every 10 days. Ghostreader AI's advantage is iOS requirement (17.0 vs 27.0). On price, ads, in-app purchases and device support 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. Ghostreader AI sells 1 in-app purchase, starting at $6.99 per month and Koham sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Ghostreader AI ships an update every 10 days, Koham every 2 days. The most recent releases landed on September 24, 2026 and October 8, 2026 respectively.
| Parameter | Ghostreader AI | Koham |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 10 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 27.0 |
| Further details — not scored | ||
| Size | 9 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | lauren brendle | 统伟 陈 |
In-app purchases
Ghostreader AI
- Avid Reader$6.991 Month
Koham
- Koham Supporter$6.99








