Comparison

Slick Inbox vs ReadBuff

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

Head to head
About

Slick Inbox

This app offers a dedicated reading experience for newsletters, separate from your main email client. It simplifies managing subscriptions, archiving issues, and discovering new content with a unique email address for sign-ups.

Highlights
  • Dedicated newsletter reading experience
  • One-click unsubscribe
  • Discover new newsletters
  • Manage subscriptions
  • Automatically archive newsletters
  • Dark theme
Features
Read full description

Slick is an inbox for your newsletters aimed to provide you the most optimal newsletter reading experience possible. With Slick, you get a much better newsletter reading experience compared to an email client. You wouldn't drink your soup with a fork, so why read your newsletters with your email client? Some features from Slick: - one-click unsubscribe - discover new newsletters - screen to manage subscriptions - automatically archive newsletters issues - dark theme - ..and more! How does it work? Slick provides you with a unique Slick email, you use this email to subscribe to newsletters and that's all you need to do. Your newsletters will start showing up in Slick, and you'll be able to enjoy an experience that's tailored for newsletters reading. What are you waiting for?

About

ReadBuff

Features
Read full description

ReadBuff — Read, Discover, and Save What Matters ReadBuff brings newsletters, RSS feeds, web articles, books, and PDF documents into one clean, distraction-free app. Follow your favorite sources, organize your reading list, and capture key ideas as searchable quotes you can revisit anytime. Instead of juggling inbox clutter, open browser tabs, ebook readers, and scattered bookmarking apps, ReadBuff gives serious readers a single, focused space to read deeply and build a personal knowledge library. Read Everything in One Place. ReadBuff is built for people who don’t just consume information—they value it. Whether you follow tech news, finance blogs, startup writing, long-form journalism, or research documents, ReadBuff keeps your daily reading organized without the chaos. Features: - Unified Inbox: Read RSS feeds, web articles, and blogs in one clean view - Dedicated Newsletter Email: Route newsletter subscriptions straight to ReadBuff and out of your personal inbox - PDF & Book Reader: Open research papers, reports, and ebooks alongside your daily feeds - Distraction-Free Experience: No ads, popups, or algorithmic feeds cluttering your feed - Cross-Device Sync: Seamlessly access your library and reading progress across all devices - Custom Collections: Organize content with folders, tags, and custom reading lists - Dark Mode: Comfortable typography layout built for day or night reading - Save Quotes That Matter - Highlight key insights, statistics, and passages across any format. Build a searchable archive of knowledge with attached notes and source context. Quote Features: - Instant Highlighting: Save text snippets from articles, newsletters, PDFs, and books in one tap - Source Tracking: Keep original links and author attribution attached automatically - Fast Search: Find any saved quote or note across your entire archive instantly Your Personal Reading Library ReadBuff isn't just a reader—it's a permanent home for the documents, books, and articles you want to study and revisit. Keep your technical PDFs, industry reports, saved articles, and ebooks together on one organized digital shelf. Perfect for: - Researchers and academics managing papers - Founders, executives, and professionals tracking industry news - Writers, journalists, and students collecting quotes and sources - Anyone who highlights, annotates, and saves what they read - Built for Serious Readers ReadBuff combines the speed of a modern RSS reader, the simplicity of a read-it-later app, and the depth of a personal knowledge archive. If you highlight obsessively, save PDFs you forget to open, or keep dozens of browser tabs open just in case, ReadBuff gives those habits a focused, organized home. Why ReadBuff? - Consolidate newsletters, web feeds, PDFs, and books into one reading hub - Turn daily reading into a searchable knowledge system - Keep original source context attached to every note and snippet - Enjoy a quiet, ad-free environment designed for deep focus Stop bouncing between open tabs, cluttered inboxes, and separate PDF viewers. ReadBuff helps you read smarter, stay organized, and save what matters. Download ReadBuff today to build a better reading habit. Terms of user (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.readbuff.com/privacy-policy

Screenshots

Slick Inbox4 screens
ReadBuff4 screens

Verdict

The call

The clearest difference is in-app purchases: Slick Inbox at none against ReadBuff's 2. Slick Inbox also leads on iOS requirement (10.0 vs 15.1). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ReadBuff sells 2 in-app purchases, starting at $9.99 per month. Slick Inbox asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Slick Inbox versus ReadBuff: the parameters behind the verdict, then further details
ParameterSlick InboxReadBuff
PriceFreeFree
Rating4.7 (21 ratings) — better—
Positive reviews76.5% of reviews—
Number of ratings21 — better—
Update frequency—Every 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.1
Further details — not scored
Size60 MB55 MB
Age rating4+17+
DeveloperWeng How YapHy Phan Bao Song

In-app purchases

None

Slick Inbox

No in-app purchases

2 purchases

ReadBuff

Subscriptions2
  • ReadBuff Monthly Pro Plan7 Days trial$9.991 Month
  • ReadBuff Annual Pro Plan14 Days trial$99.991 Year

Questions

Is Slick Inbox free?
Slick Inbox is free to download, with no in-app purchases.
Is ReadBuff free?
ReadBuff is free to download, with in-app purchases available.
Do Slick Inbox or ReadBuff have ads?
Neither Slick Inbox nor ReadBuff shows ads.

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