Comparison

Flux vs Casterly

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

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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.

About

Casterly

Features
Read full description

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

Flux4 screens
Casterly4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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.

UpkeepUpdate frequency

Flux ships an update every 3 days, Casterly weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard5 real differences Β· 4 level
Flux versus Casterly: the parameters behind the verdict, then further details
ParameterFluxCasterly
Price$3.99Free β€” better
Positive reviews100.0% of reviewsβ€”
Update frequencyEvery 3 days β€” betterWeekly
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationPaidβ€”
Best chart rank#120 β€” betterβ€”
DevicesiPhone, iPad, MaciPhone, iPad, Apple Watch
Requires iOS26.017.6 β€” better
Further details β€” not scored
Size19 MB15 MB
Age rating17+12+
DeveloperAdrien DONOTSodium Studio, LLC

In-app purchases

None

Flux

No in-app purchases

1 purchases

Casterly

Subscriptions1
  • Casterly Pro$9.991 Year

Questions

Is Flux free?
Flux costs $3.99, with no in-app purchases.
Is Casterly free?
Casterly is free to download, with in-app purchases available.
Do Flux or Casterly have ads?
Neither Flux nor Casterly shows ads.
Which is updated more often, Flux or Casterly?
Flux ships an update every 3 days, and Casterly weekly. Most recently, Flux was updated on October 30, 2026 and Casterly on October 31, 2026.

Other comparisons