Castly vs Kinder
Price, ratings, monetisation and update history for both apps, side by side â with what reviewers say about each.
Castly
Read full descriptionHide full description
Give every character a voice. Turn your own EPUB, PDF, and TXT ebooks into audiobooks with Castly. AI identifies characters in your story and assigns different voices to narration and dialogue, making it easier to follow who is speaking. YOUR BOOKS, READY TO LISTEN Import a novel or ebook, check its chapters, and start listening. Keep your books together in your library and make time for a story on your commute, on a walk, or before bed. CHOOSE A VOICE FOR EACH CHARACTER Give the narrator and characters their own voices. Preview and choose voices to match the people you imagine, then adjust the assignments to suit your story. READ ALONG AND PICK UP WHERE YOU LEFT OFF Follow the text while the audio plays, set a comfortable playback speed, and continue from your last listening position when you return. BACKGROUND PLAYBACK AND SLEEP TIMER Keep listening while using other apps. Set a sleep timer or stop playback after a selected chapter. TRY A STORY BEFORE IMPORTING YOUR OWN Sign in to try a built-in, three-chapter sample story and experience multi-character narration before adding your own ebooks. CASTLY PRO Some character voice features require Castly Pro. Check the available plans, prices, and included features in the app before subscribing. Supports EPUB, PDF, and TXT files. PDFs must contain extractable text. Privacy Policy: https://fit.slothease.com/en/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Kinder
Read full descriptionHide full description
Kinder is an ebook reader focused on local reading, helping you organize, open, and keep reading your EPUB, PDF, MOBI, AZW3, and other ebook files more easily. Key Features: - Supports common ebook formats, including EPUB, PDF, MOBI, and AZW3 - Import local files or transfer books over Wi-Fi - Automatically detects book titles, authors, covers, file sizes, and more - Sort books by reading progress, file size, import date, and other options - Jump through the table of contents, add bookmarks and notes, and track reading progress - Copy selected text, look up words in the dictionary, translate, search the web, or use read-aloud - Quickly navigate PDFs with page thumbnails - Rate books and edit book titles or authors - Supports a dark reading interface for long reading sessions
Screenshots
Verdict
The clearest difference is in-app purchases: Kinder at none against Castly's 2. On price, update cadence, ads 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. Castly sells 2 in-app purchases, starting at $9.99 per month. Kinder asks for nothing beyond the download.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.
| Parameter | Castly | Kinder |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No â better |
| Devices | iPhone, iPad â better | iPhone |
| Requires iOS | 18.0 â better | 18.6 |
| Further details â not scored | ||
| Size | 29 MB | 7 MB |
| Age rating | 12+ | 4+ |
| Developer | SlothEase | åäšŪ åž |
In-app purchases
Castly
- Castly Pro Monthly$9.991 Month
- Castly Pro Annual$49.991 Year
Kinder
No in-app purchases









