Comparison

Sleevy vs Zettelkasten

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

Head to head
About

Sleevy

Features
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Sleevy is a read-later bookmark manager that lets you save links from anywhere and read them on any device. ONE TAP TO SAVE Tap the share button on any page or link, pick Sleevy, and it lands in your queue. Also available as a Chrome extension, Raycast plugin, web app, MCP and REST API. EVERY DEVICE IN SYNC Save on one device, read on another. Your items sync across iPhone, desktop, and the web before you can blink. SMART ORGANIZATION Items are automatically categorized by type โ€” articles, videos, repositories, and websites. Add tags and filter by source, tag, or full-text search. BUILT TO EXTEND A REST API with personal API keys lets you connect Sleevy to your scripts, shortcuts, and automations. Simple JSON over HTTPS, no SDK required. KEYBOARD-DRIVEN The web companion is fully driveable from the keyboard. j/k to navigate, o to open, n to capture, and a fuzzy-find command palette.

About

Zettelkasten

Features
Read full description

Stop losing ideas in a pile of disconnected notes. NoteOrbit is a linked-notes app that turns everything you write into a living knowledge graph โ€” every note becomes a node you can see, connect, and explore. Most note apps bury your thinking in folders. NoteOrbit does the opposite: type a note, drop a [[wiki-link]] to any other note, and the connection is built for you โ€” both ways. Open any note and you instantly see what references it. Then step back and watch your ideas orbit as a glowing constellation you can pan, zoom, and tap to follow the thread. WHAT YOU GET - Write a note, add a [[wiki-link]], and NoteOrbit autocompletes titles and wires up the connection for you - Automatic backlinks so every note shows exactly what links to it โ€” context folders can never give you - An interactive orbit graph that lays out your notes by how they actually connect - Instant tags with #hashtags to slice your notes any way you think - Hubs and orphans finder that surfaces your most-connected ideas and the notes hanging loose - Full-text search across every note, title, and link PERFECT FOR - Students and researchers building study and reference notes that reinforce each other - Writers and thinkers growing a personal knowledge base or second brain - Zettelkasten and PKM fans who want backlinks without a heavy desktop setup - Anyone journaling ideas and projects who wants to rediscover old connections WHY NOT JUST USE FOLDERS Folders force every note into one place and hide how your ideas relate. NoteOrbit lets a note live in as many contexts as it links to, then draws the map for you โ€” so the connection you made months ago is one tap away, not lost three folders deep. PRIVACY Everything stays on your device. No account, no sign-in, no ads, no tracking. Your notes never leave your phone. FULL ACCESS NoteOrbit Premium unlocks the full experience: unlimited notes and connections, the complete interactive orbit graph, hubs, tags and the orphan finder, plus Markdown export to take your notes anywhere. Choose the plan that fits: - Weekly - Yearly - Lifetime (one-time purchase) Open NoteOrbit, write your first note, and link it โ€” watch your thinking take shape. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com

Screenshots

Sleevy4 screens
Zettelkasten4 screens

Verdict

The call

The clearest difference is in-app purchases: Sleevy at none against Zettelkasten's 2. Sleevy also leads on update cadence (fortnightly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days. Sleevy asks for nothing beyond the download.

UpkeepUpdate frequency

Sleevy ships an update fortnightly, Zettelkasten monthly. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

Scorecard2 real differences ยท 4 level
Sleevy versus Zettelkasten: the parameters behind the verdict, then further details
ParameterSleevyZettelkasten
PriceFreeFree
Update frequencyFortnightly โ€” betterMonthly
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS18.617.0 โ€” better
Further details โ€” not scored
Size8 MB6 MB
Age rating4+4+
DeveloperOnno Klein HofmeijerPhuc Pham

In-app purchases

None

Sleevy

No in-app purchases

2 purchases

Zettelkasten

Subscriptions2
  • Weekly$9.997 Days
  • Yearly3 Days trial$49.991 Year

Questions

Is Sleevy free?
Sleevy is free to download, with no in-app purchases.
Is Zettelkasten free?
Zettelkasten is free to download, with in-app purchases available.
Do Sleevy or Zettelkasten have ads?
Neither Sleevy nor Zettelkasten shows ads.
Which is updated more often, Sleevy or Zettelkasten?
Sleevy ships an update fortnightly, and Zettelkasten monthly. Most recently, Sleevy was updated on October 7, 2026 and Zettelkasten on October 10, 2026.

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