Comparison

Lockbook vs AppOtter

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

Head to head
About

Lockbook

A secure, open-source note-taking app prioritizing user privacy. It encrypts all your data locally, ensuring only you and authorized users can access your notes. Offers seamless syncing and sharing across devices, with a developer-friendly command-line interface.

Highlights
  • End-to-end encryption
  • Open-source code
  • Cross-device syncing
  • Note sharing
  • Developer CLI
  • No personal data collection
Features
Read full description

Lockbook is an end-to-end encrypted notes app for writing, sketching, storing files, syncing across devices, and collaborating in real time. Your notes are encrypted before they leave your device, so even we can't read them. Lockbook is 100% open source: https://github.com/lockbook/lockbook Fast & Native: We built Lockbook for everyday use because we use Lockbook every day. Our native apps feel at home on every platform, with fast sync, offline support, and a polished Markdown editor for serious notes. Secure: Keep your thoughts to yourself. Lockbook encrypts your notes with keys generated on your devices. Only you and the people you share with can access your notes, folders, sketches, and files. Private: Know your customer? We sure don't. We don't collect your email, phone number, or name. We don't need a password. Lockbook is for people with better things to worry about than privacy. Collaborative: Share folders, edit notes together, and see live updates from collaborators without giving up end-to-end encryption. Open: Write in Markdown, sketch in SVG, and keep your work in formats you can actually use. Honest: Be the customer, not the product. We sell a note-taking app, not your data. Developer Friendly: The Lockbook CLI fits right into your favorite chain of piped-together Unix commands. Search your notes with fzf, edit them with vim, and schedule backups with cron. When scripting doesn't cut it, use our Rust library for a robust programmatic interface. Website: https://lockbook.net Terms of Service: https://lockbook.net/tos License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lockbook.net/privacy-policy

About

AppOtter

Features
Read full description

Discover the Hidden Numbers Behind Every App AppOtter reveals the metrics behind any iOS app. Get revenue estimates, download data, ratings, and AI-generated insights in seconds. What You Get: Revenue & Download Analytics — See estimated monthly revenue and downloads for any app AI-Powered Insights — Get summaries, key features, target audience, and category analysis Quick Search — Search by App ID or paste an App Store URL Save Your Research — Build a library of saved app insights Trending Apps — Discover popular apps worth analyzing Share Integration — Share app links from Safari or other apps directly to AppOtter Perfect For: App developers researching competitors Marketers analyzing market trends Investors evaluating app opportunities Product managers benchmarking performance Anyone curious about app economics Premium Features: Unlock unlimited searches, save unlimited queries and get early access to new features. How It Works: Search any app by ID or App Store URL Get instant analytics and AI insights Save your research for later Export professional reports Stop guessing. Start analyzing. Download AppOtter and uncover the data behind every app. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Lockbook4 screens
AppOtter3 screens

Verdict

The call

The clearest difference is iOS requirement: AppOtter at 15.1 against Lockbook's 26.0. On price, update cadence, ads and in-app purchases 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. Lockbook sells 1 in-app purchase, starting at $2.99 per month and AppOtter sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Lockbook versus AppOtter: the parameters behind the verdict, then further details
ParameterLockbookAppOtter
PriceFreeFree
Rating5.0 (14 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings14 — better—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size79 MB49 MB
Age rating4+4+
DeveloperLockbook LLCMatti Sirokov

In-app purchases

1 purchases

Lockbook

Subscriptions1
  • 30GB$2.991 Month
2 purchases

AppOtter

Subscriptions2
  • AppOtter Monthly$4.991 Month
  • AppOtter Annual$44.991 Year

Questions

Is Lockbook free?
Lockbook is free to download, with in-app purchases available.
Is AppOtter free?
AppOtter is free to download, with in-app purchases available.
Do Lockbook or AppOtter have ads?
Neither Lockbook nor AppOtter shows ads.
Which is updated more often, Lockbook or AppOtter?
Lockbook ships an update weekly, and AppOtter weekly. Most recently, Lockbook was updated on October 24, 2026 and AppOtter on October 25, 2026.

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