Storybase vs NextPhase Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Storybase
This app offers an immersive way to experience audiobooks and ebooks, allowing readers to interact with books and authors. Authors can build deeper connections with their audience and extend the reach of their work.
- Immersive reading and listening experience
- AI assistant for book interaction
- Offline download for books and audiobooks
- Direct author communication and forums
- Author tools for reader engagement
- Shareable book chapters and links
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Storybase helps authors build relationships with their readers, and helps readers engage deeper with books through an immersive and interactive experience. FOR READERS A new way to experience audiobooks and ebooks: immersive, interactive, and connected to the author every step of the way. • Immersive: switch between audiobook and ebook, read and listen in sync, play your own music alongside your audiobook, and keep listening from your lock screen or CarPlay. • Interactive: ask the book questions with its AI assistant, by typing or out loud, and share chapters with the people who need them. • Offline: download audiobooks and ebooks to listen and read anywhere. • Connected: follow the author, join the book's forum, and get messages straight from the author. FOR AUTHORS What if your book was the beginning, not the end? • Reach: get your book into more hands with instant share links. • Engage: see how readers move through your book, and add AI prompts and next steps to the experience. • Activate: turn attention into relationships. Invite readers to stay in touch and show them where to go next. • Multiply: give your team, clients, and readers an easy way to pass the book forward. A book should do more than sit on a shelf. It is the door into everything you do next. Some features require a Reader Premium, Author Plus, or Author Pro subscription. Use of this app is bound by the Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
NextPhase Reader
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Read it. Listen to it. Learn from it. Listen instead of read. Turn your documents and compatible books into audio. NextPhase Reader brings reading, listening and language practice together on iPhone and iPad, using content you choose. LISTEN TO YOUR CONTENT • Read supported books and documents aloud using Apple device voices by default, with voice, speed and sleep-timer controls. Optional online voices are also available for live listening. • Listen to the original text, its translation, or both. • With Pro, prepare chapters or PDF pages as saved audio for offline playback. Export separate M4A recordings to Files or share them with another app. • Create saved audio with downloaded Kokoro voices, on your device with the app in the foreground. Apple device voices and online voices are for live listening; online voices require an internet connection. READ WHAT INTERESTS YOU • Import your own DRM-free EPUB, KEPUB, PDF, MOBI, AZW3, FB2, TXT, RTF, DOCX and HTML files. • Explore free classics through Project Gutenberg and Standard Ebooks, or connect a compatible OPDS library. • Adjust text size and reading layout, choose Light, Sepia or Dark, and keep highlights, notes and bookmarks. • Read text-based PDFs in their original layout or as flowing text. Scanned PDFs without selectable text are not supported for translation or speech. LEARN FROM YOUR READING Stay motivated. Read in the languages you want. Import content for side-by-side reading. • Read original and translated EPUB paragraphs together: side by side on wider screens, interleaved on narrow screens. • Save words in context and return to them with spaced-repetition review. • Use pronunciation guides for supported languages, including pinyin, furigana and romaja. • With Pro, highlight saved words as they reappear, export vocabulary as CSV, and export compatible books as bilingual EPUBs. Your first vocabulary CSV export is free. TRANSLATION CHOICES Built-in online translation needs no API key. Apple on-device translation requires a supported device, OS and downloaded language pair; unavailable language packs may lead to an online fallback. You can also use your own DeepL, OpenAI, Google Cloud or Azure key. Provider availability and quality vary by language. Completed translations are cached for reuse. PRO: ONE-TIME PURCHASE Choose one book to try Pro features free. Unlock Pro for all your books with a one-time in-app purchase for major version 1. No subscription. Pro includes natural voice downloads, saved audio, bilingual EPUB export and vocabulary export. Family Sharing is supported. Restore purchases is available in Settings. YOUR CONTENT, YOUR CHOICES Core reading works without an account. Your library is stored locally. Online translation and speech send relevant text to the selected services; optional account sync uploads reading data. Downloaded voices and saved audio support offline listening, but online services and new downloads require a connection. Compatible, DRM-free content only. Audio exports are separate chapter or page recordings, not a single combined audiobook. Interface available in English and Spanish.
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Verdict
Storybase and NextPhase Reader are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Storybase sells 3 in-app purchases, starting at $17.99 per month and NextPhase Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Storybase | NextPhase Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 135 MB | 90 MB |
| Age rating | 12+ | 12+ |
| Developer | Storyline Creative, LLC | NextPhase LLC |
In-app purchases
Storybase
- Reader Premium$17.991 Month
- Author Plus$107.991 Month
- Author Pro$214.991 Month
NextPhase Reader
- NextPhase Reader Pro$29.99









