Flux vs Casterly
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Flux
Consolidate your RSS and Atom feeds into a streamlined reading experience across Apple devices. Organize articles, discover content through images, and enjoy immersive reading modes. Listen to articles with text-to-speech and utilize AI summarization.
- Consolidates RSS and Atom feeds
- Organize articles into folders
- Browse stories with Feed Wall (images)
- Full-screen immersive reading mode
- Text-to-speech article playback
- AI article summarization (Apple Intelligence)
- iCloud library sync across devices
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Flux brings your RSS and Atom feeds together in a reading app for iPhone, iPad and Mac. Follow your sources, organize your articles and find what interests you. TODAY'S ESSENTIALS The Today view offers a daily selection of your articles. The Feed Wall lets you browse stories through images. On iPad and Mac, full-screen mode makes reading more immersive. YOUR SOURCES, YOUR ORGANIZATION Add feeds, organize them into folders and save articles for later. Import and export your library to keep your sources together. READ YOUR WAY Open articles in the reader or visit the original page. Listen with text-to-speech. On compatible devices, Apple Intelligence can summarize articles directly on your device. This feature requires Apple Intelligence to be enabled and available in your language. ACROSS YOUR APPLE DEVICES Flux offers an interface tailored to iPhone, iPad and Mac, widgets, and iCloud library sync when you use iCloud. No Flux account required. You choose the sources you want to follow.
Casterly
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Your podcasts, nothing else. Casterly is a clean, retro-inspired podcast player for people who just want to listen. No suggested shows. No algorithmic noise. No cluttered feeds trying to tell you what to hear next. No personal data collected. Just your podcasts, ready to play. Everything you need - Search, browse and subscribe to unlimited podcasts - Download episodes for offline playback - Auto-download new episodes from your subscribed shows - Native Apple Watch companion app with complication - New episode notifications - turn them on or off for each show individually - Save episodes to revisit later - Chapter support - AirPlay support - iCloud sync across your devices - Home screen widget with playback controls - Manually control storage limits Unlock the full experience with Casterly Pro which gives you: - CarPlay support for hands-free listening on the road - Variable playback speed - Sleep timer - Import/export OPML files for easy migration - Add any podcast directly via RSS feed, perfect for indie and niche shows - Helps support a one-person indie app studio Privacy policy: https://sodiumstudio.com/casterly-privacy Terms of use: https://sodiumstudio.com/casterly-terms Proudly made in New England
Screenshots
Verdict
The clearest difference is price: Casterly at Free against Flux's $3.99. Casterly also leads on iOS requirement (17.6 vs 26.0). Flux's advantage is in-app purchases (none vs 1) and update cadence (every 3 days vs weekly). On ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Casterly is free to download; Flux costs $3.99 up front. Casterly sells 1 in-app purchase, starting at $9.99 per year. Flux asks for nothing beyond the download.
Flux ships an update every 3 days, Casterly weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Flux | Casterly |
|---|---|---|
| Price | $3.99 | Free β better |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 3 days β better | Weekly |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Paid | β |
| Best chart rank | #120 β better | β |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Apple Watch |
| Requires iOS | 26.0 | 17.6 β better |
| Further details β not scored | ||
| Size | 19 MB | 15 MB |
| Age rating | 17+ | 12+ |
| Developer | Adrien DONOT | Sodium Studio, LLC |
In-app purchases
Flux
No in-app purchases
Casterly
- Casterly Pro$9.991 Year









