# Flat RSS vs SereneReader

The clearest difference is update cadence: SereneReader at every 4 days against Flat RSS's every 10 days. Flat RSS's advantage is iOS requirement (18.6 vs 26.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Flat RSS sells 3 in-app purchases, starting at $3.99 per month and SereneReader sells 1 in-app purchase, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Flat RSS ships an update every 10 days, SereneReader every 4 days. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Flat RSS | SereneReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/serenereader-rss-feed-reader/id6776072640/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Freemium | Freemium |
| Size | 19 MB | 5 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Rene Fischer](https://appshunter.io/developer/1868527187) | [JonesLabs LLC](https://appshunter.io/developer/6776067274) |

## What reviewers say

### Flat RSS

[App page](https://appshunter.io/ios/app/flat-rss/id6759013390)

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:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flat Pro Monthly | $3.99 | per month |
| Flat Pro Yearly | $19.99 | per year |
| Flat Pro Lifetime | $44.99 | one-time |


### SereneReader

[App page](https://appshunter.io/ios/app/serenereader-rss-feed-reader/id6776072640)

A minimalist RSS reader designed for focused reading without distractions. Syncs across all your devices and offers offline access to articles. Organize your feeds and discover new content with ease.

**Highlights:** Offline article reading, Cross-device sync, Minimalist interface, Customizable reading view, Feed organization, Discover new feeds

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $6.99 | per month |


## Frequently asked questions

### Is Flat RSS free?

Flat RSS is free to download, with in-app purchases available.

### Is SereneReader free?

SereneReader is free to download, with in-app purchases available.

### Do Flat RSS or SereneReader have ads?

Neither Flat RSS nor SereneReader shows ads.

### Which is updated more often, Flat RSS or SereneReader?

Flat RSS ships an update every 10 days, and SereneReader every 4 days. Most recently, Flat RSS was updated on October 2, 2026 and SereneReader on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*