Comparison

ReadOne vs Flat RSS

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

Head to head
About

ReadOne

Read full description

ReadOne is a clean, minimal reader designed for focused reading. Gather your favorite RSS feeds, articles, and newsletters in one beautiful place. Free from clutter, distractions, and algorithms. Key Features: - Distraction-free reading interface with customizable typography. - Offline support to save articles for later. - Sync seamlessly across all your devices. - Organize your content with tags and custom folders. - Smart reading progress tracking.

About

Flat RSS

Consolidate all your reading, watching, and listening into one calm, chronological feed. Save articles, videos, and podcasts from various sources, with offline access and cross-device sync. Enjoy a private, ad-free experience.

Highlights
  • Unified feed for RSS, podcasts, videos, social media
  • Save articles, videos, and links to Stash
  • Offline access for saved content
  • Cross-device iCloud sync
  • Ad-free and privacy-focused experience
  • Customizable feed filtering
Features
Read full description

Flat is one calm place for everything you read, watch, and listen to. Flat brings RSS, podcasts, videos, social feeds, and saved links together in one quiet place. No unread counts. No pressure. No algorithmic ranking. FOLLOW YOUR FAVORITE SOURCES • RSS, Atom, JSON feeds, podcasts, YouTube, Reddit, Mastodon, Bluesky, and more • Paste a URL or keyword and Flat finds the right source • Browse a clean chronological timeline • Filter by source, focus or hide feeds, and filter out unwanted keywords SAVE ANYTHING • Save articles, videos, podcasts, and links to your Stash • Save links from any app, browser, or Flat browser extension • Auto-stash items from feeds you never want to miss • Keep saved items until you are ready to come back LISTEN AND WATCH • Play podcasts and videos with playback progress synced across devices • Build your own audio and video queue • Use chapters and a sleep timer AVAILABLE EVERYWHERE • iPhone, iPad, and Mac • Automatic iCloud sync across devices • Offline access for saved articles, audio, and video podcasts PRIVACY FIRST • No ads • No tracking • No account required • Your reading data is not used for advertising FLAT PRO Start free with Stash, saved links from other apps, and up to 30 feeds. Upgrade to Flat Pro for unlimited feeds, so new articles, podcasts, and videos from all your favorite sources appear automatically in your timeline. A free trial is available. Just your content, at your pace. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://justasimple.app/privacy

Screenshots

ReadOne4 screens
Flat RSS4 screens

Verdict

The call

The clearest difference is in-app purchases: ReadOne at none against Flat RSS's 3. Flat RSS's advantage is iOS requirement (18.6 vs 27.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

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

Both are free to download. Flat RSS sells 3 in-app purchases, starting at $3.99 per month. ReadOne asks for nothing beyond the download.

UpkeepUpdate frequency

ReadOne ships an update every 6 days, Flat RSS every 10 days. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

Scorecard2 real differences Ā· 6 level
ReadOne versus Flat RSS: the parameters behind the verdict, then further details
ParameterReadOneFlat RSS
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 6 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad, Mac
Requires iOS27.018.6 — better
Further details — not scored
Size8 MB19 MB
Age rating4+17+
DeveloperHongbo JiRene Fischer

In-app purchases

None

ReadOne

No in-app purchases

3 purchases

Flat RSS

Subscriptions2
  • Flat Pro Monthly7 Days trial$3.991 Month
  • Flat Pro Yearly7 Days trial$19.991 Year
One-time1
  • Flat Pro Lifetime$44.99

Questions

Is ReadOne free?
ReadOne is free to download, with no in-app purchases.
Is Flat RSS free?
Flat RSS is free to download, with in-app purchases available.
Do ReadOne or Flat RSS have ads?
Neither ReadOne nor Flat RSS shows ads.
Which is updated more often, ReadOne or Flat RSS?
ReadOne ships an update every 6 days, and Flat RSS every 10 days. Most recently, ReadOne was updated on October 14, 2026 and Flat RSS on October 2, 2026.

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