Comparison

ISBN vs Fable Frog

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ISBN

Features
Read full description

ISBN資料庫收錄了台灣完整書籍資料,透過搜尋名稱或掃描ISBN書碼查找書籍,對比線上書店價格。

About

Fable Frog

This app offers a premium listening experience for your self-hosted audiobooks. Enjoy advanced playback controls, library management, offline downloads, and detailed listening statistics. It's designed with accessibility and privacy in mind, connecting seamlessly to your Audiobookshelf server.

Highlights
  • Variable speed and volume boost
  • Sleep timer with shake to extend
  • Chapter navigation with durations
  • Bookmarks with notes
  • Per-book playback settings
  • Offline downloads with smart management
  • Listening statistics and charts
  • CarPlay and widget support
Features
Read full description

The best way to enjoy your audiobooks. Fable Frog is a native iOS client for Audiobookshelf — built from the ground up for a premium listening experience. Connect to your self-hosted server and enjoy your library with a beautiful, feature-packed player designed for how you actually listen. PLAYBACK THAT JUST WORKS • Variable speed (0.5x – 3x) and volume boost up to 200% • Sleep timer with presets, custom duration, or end of chapter • Shake to extend your timer without opening your phone • Chapter navigation with durations at a glance • Bookmarks with notes up to 5,000 characters • Per-book playback settings that remember how you like each title • AirPlay streaming to your favorite speakers YOUR LIBRARY, YOUR WAY • Browse by books, authors, series, narrators, or genres • Filter by progress and genre, sort by title, author, date added, duration, or last listened • Instant search across your entire library • Follow series and track upcoming releases automatically • Create custom playlists, rate and review books • Alphabetical index for jumping through large collections OFFLINE DOWNLOADS Download books and listen anywhere — no connection needed. Smart Downloads automatically grab your next listen and clean up finished titles. Wi-Fi only mode keeps your data plan safe. LISTENING STATISTICS Understand your listening life with daily, weekly, monthly, and yearly charts. See genre breakdowns, top series rankings, speed savings, finished book trophies, and fun facts about your habits. CARPLAY A dedicated driving interface built for safe, distraction-free listening in the car. Large touch targets, simplified controls, and quick access to recent and library books. WIDGETS Lock screen widget with a circular progress gauge for your current listen. iOS 18 Control Center widgets for quick play/pause without leaving what you're doing. MAKE IT YOURS • 20 themes including 3 accessibility-optimized options • Custom app icons (Neon, Sunset, Forest) • 6 text size levels from XS to XXL • Customizable lock screen widget icons • Configurable skip durations and player controls BUILT FOR EVERYONE • Full VoiceOver support with comprehensive labels and adjustable controls • Voice Control compatible — navigate by voice • Dynamic Type support — text scales to 200%+ with in-app size slider • Accessibility themes: High Contrast (AAA), Blue-Orange (CVD), Pink-Teal (CVD) • Differentiate Without Color support — shapes and icons supplement color • All themes validated for WCAG AA contrast standards • Respects Reduce Motion and Reduce Transparency system settings • Car mode with extra-large touch targets • Siri integration for hands-free playback control PRIVACY FIRST No analytics. No telemetry. No tracking. No ads. Your data stays between your device and your server — nothing else. Credentials are stored exclusively in the iOS Keychain. CONNECTS TO YOUR SETUP • Username/password and OIDC authentication (Keycloak, Authelia, Authentik, and more) • Custom HTTP headers for reverse proxies (Caddy, Nginx, Traefik) • Multi-library support on the same server • Automatic token refresh and session management Available in 15+ languages with full RTL support. Requires a self-hosted Audiobookshelf server (v2.x). Fable Frog is an independent third-party client and is not affiliated with the Audiobookshelf project. Terms of Service: https://fablefrog.app/terms Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stddla/ Privacy Policy: https://fablefrog.app/privacy

Screenshots

ISBN3 screens
Fable Frog4 screens

Verdict

The call

The clearest difference is in-app purchases: ISBN at none against Fable Frog's 2. ISBN also leads on iOS requirement (14.0 vs 17.0). Fable Frog's advantage is ads (none vs shown) and update cadence (weekly vs every 4 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fable Frog sells 2 in-app purchases, starting at $8.00 per year. ISBN asks for nothing beyond the download.

UpkeepUpdate frequency

ISBN ships an update every 4 months, Fable Frog weekly. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 6 level
ISBN versus Fable Frog: the parameters behind the verdict, then further details
ParameterISBNFable Frog
PriceFreeFree
Rating—4.3 (3 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 4 monthsWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS14.0 — better17.0
Further details — not scored
Size16 MB33 MB
Age rating4+4+
Developer剑秋 肖Paul DeVito

In-app purchases

None

ISBN

No in-app purchases

2 purchases

Fable Frog

Subscriptions1
  • Premium Annual$8.001 Year
One-time1
  • Premium Lifetime$12.00

Questions

Is ISBN free?
ISBN is free to download, with no in-app purchases.
Is Fable Frog free?
Fable Frog is free to download, with in-app purchases available.
Do ISBN or Fable Frog have ads?
ISBN shows ads; Fable Frog does not.
Which is updated more often, ISBN or Fable Frog?
ISBN ships an update every 4 months, and Fable Frog weekly. Most recently, ISBN was updated on October 19, 2026 and Fable Frog on October 15, 2026.

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