Software Alternatives, Accelerators & Startups

ArrowOS VS PrivacyNotes

Compare ArrowOS VS PrivacyNotes and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

ArrowOS logo ArrowOS

ArrowOS is an AOSP based project started with the aim of keeping things simple, clean and neat.

PrivacyNotes logo PrivacyNotes

Zero-knowledge encrypted notes, tasks, journals, files, and passwords in one app. Your keys never leave your device. One-time price, no subscription. Hosted in Switzerland.
Visit Website
  • ArrowOS Landing page
    Landing page //
    2023-02-11
  • PrivacyNotes Journal
    Journal //
    2026-06-25
  • PrivacyNotes Settings
    Settings //
    2026-06-25
  • PrivacyNotes Website
    Website //
    2026-06-25

PrivacyNotes is a zero-knowledge encrypted workspace that brings your notes, tasks, journals, files, and passwords into one app, so you stop juggling four separate subscriptions.

Everything is encrypted on your device with XChaCha20-Poly1305 before it ever syncs. Your keys are derived from a recovery phrase that never touches our servers, so we cannot read your content, your filenames, or anything else. This is real zero-knowledge, not a marketing label.

Five pillars, one encrypted app:

  • Notes - a live markdown editor with note-to-note links, tags, and fast full-text search
  • Tasks - native checklists and task management next to your notes
  • Journals - daily entries with built-in mood, sleep, and medication tracking
  • Files - an encrypted vault for images, audio, and attachments
  • Vault - lock sensitive notes and logins behind a PIN or biometrics

Built for privacy, not surveillance:

  • No ads, no trackers, no analytics, ever
  • Sign in anonymously with a recovery phrase or with Google. No email or personal details required.
  • Open core: the encryption layer and database schema are published for independent review
  • Burn notes: self-destructing shares the server cannot read

Pricing that respects you:

  • Free covers every pillar with two-device sync and offline use
  • Pro is a one-time free, not a subscription, adding unlimited devices, note history, and more storage
  • Optional storage add-ons when you need them

Works on web, macOS, and soon iOS, Android, Windows and Linux with a responsive mobile layout. Import from Apple Notes, Standard Notes, Google Keep, Obsidian, and markdown in a few clicks.

ArrowOS

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

PrivacyNotes

$ Details
freemium $48.0 / One-off (Early adopter price)
Platforms
MacOS Web Firefox Google Chrome Edge Safari
Release Date
2026 June
Startup details
Country
Switzerland
Employees
1 - 9

ArrowOS features and specs

  • Performance Optimization
    ArrowOS is designed to be lightweight and clean, which typically results in better performance and faster response times compared to stock Android versions with heavy customizations.
  • Regular Updates
    The community actively maintains ArrowOS, providing regular security patches and updates to keep devices secure and up-to-date with the latest Android features.
  • Customization
    ArrowOS offers more customization options than stock Android, allowing users to tailor their device settings and interface to their personal preferences.
  • Battery Efficiency
    With its focus on a minimal and efficient design, ArrowOS often provides better battery life compared to more resource-intensive ROMs and stock firmware.
  • Privacy Features
    ArrowOS incorporates various privacy enhancements, offering users more control over app permissions and data handling than typical OEM ROMs.

Possible disadvantages of ArrowOS

  • Limited Device Support
    ArrowOS may not support as wide a range of devices as some other custom ROMs, potentially limiting its availability for certain users.
  • Potential Stability Issues
    As with any custom ROM, users might encounter bugs or stability problems, especially on devices without official support.
  • Warranty Concerns
    Installing ArrowOS can void the warranty of a device, as manufacturers typically do not support third-party software modifications.
  • Learning Curve
    For users new to custom ROMs, there may be a learning curve associated with flashing a new ROM and managing updates or issues.
  • Banking Apps and DRM limitations
    Certain banking applications and DRM-protected content may not function properly on ArrowOS due to SafetyNet and DRM restrictions.

PrivacyNotes features and specs

  • Privacy-focused
    PrivacyNotes is designed with privacy as a core principle, aiming to keep your notes secure and away from third-party access, which appeals to users concerned about data confidentiality.
  • Encryption
    The service typically emphasizes encryption to protect note content, meaning your data is scrambled and less vulnerable to unauthorized reading if intercepted or stored.
  • Ephemeral notes
    Many privacy note services offer self-destructing or temporary notes that automatically delete after being read or after a set time, reducing the digital footprint left behind.
  • Simple and lightweight
    Such tools often provide a clean, minimal interface focused on quick note creation and sharing without unnecessary features, making it easy to use.
  • No account required
    Privacy-oriented note apps frequently allow you to create and share notes without registration, lowering the barrier to entry and reducing personal data collection.

Analysis of PrivacyNotes

Overall verdict

  • I don't have verified, specific information about PrivacyNotes (privacynotes.app) to make a reliable assessment of its quality, security practices, or features. I cannot confirm details about its encryption methods, privacy policy, company background, or user reviews.

Why this product is good

  • Unable to verify claims about encryption or zero-knowledge architecture without independent confirmation
  • No access to current user reviews, ratings, or reputation data for this specific service
  • Cannot confirm company legitimacy, ownership, or track record
  • Unable to verify uptime, reliability, or actual security audit results
  • No information available on pricing structure or terms of service specifics

Recommended for

  • Before using, research independently via security audit reports if available
  • Check for third-party security reviews or penetration testing results
  • Verify the company's privacy policy and data handling practices directly on their site
  • Look for user reviews on independent platforms rather than relying on marketing claims
  • Consider established, well-audited alternatives if handling highly sensitive information

ArrowOS videos

ArrowOS 11 On Redmi Note 7 Pro || Amazing in every way, Almost...

PrivacyNotes videos

No PrivacyNotes videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to ArrowOS and PrivacyNotes)
Mobile OS
100 100%
0% 0
Note Taking
0 0%
100% 100
Mobile SDK
100 100%
0% 0
Task Management
0 0%
100% 100

Questions & Answers

As answered by people managing ArrowOS and PrivacyNotes.

Who are some of the biggest customers of your product?

PrivacyNotes's answer:

Honestly? We have no idea, and that is the entire point. Signup is anonymous (a recovery phrase or Google, no email or personal details), the app ships zero analytics and zero trackers, and zero-knowledge encryption means we cannot see who you are or what you store. We could not name a single customer if we tried. A privacy product that tracked its users closely enough to brag about them would be missing the plot.

What makes your product unique?

PrivacyNotes's answer:

PrivacyNotes is the only zero-knowledge encrypted workspace that keeps notes, tasks, journals, files, and a password vault behind one set of on-device keys. Most privacy apps do one of those well and rent it to you monthly. We do all five, encrypt everything with XChaCha20-Poly1305 before it leaves your device, and charge once instead of forever. The encryption core is open core, published so the claims can be verified rather than trusted.

Why should a person choose your product over its competitors?

PrivacyNotes's answer:

Three reasons:

  • One app, not four subscriptions. Standard Notes, Day One, and Lunatask each rent you a slice (notes, journaling, tasks). PrivacyNotes covers all of them plus files and a vault, for a fair one-time fee.
  • Real zero-knowledge. Your keys come from a recovery phrase that never touches our servers, so we cannot read your notes, your filenames, or your metadata. Some encrypted apps leave note or task metadata in the clear; we do not.
  • Verifiable, not just trusted. The crypto and schema are open core and published for review, and there is no ad, tracker, or analytics anywhere in the app.

How would you describe the primary audience of your product?

PrivacyNotes's answer:

Privacy-conscious individuals and independent professionals who handle information they would not want a vendor reading: lawyers, journalists, healthcare and mental-health practitioners, developers, security specialists, researchers, and founders. It also fits anyone who simply wants one private home for their notes, tasks, journaling, and wellness tracking instead of spreading them across surveillance-funded apps.

Which are the primary technologies used for building your product?

PrivacyNotes's answer:

React, TypeScript, Vite and Tailwind CSS.

What's the story behind your product?

PrivacyNotes's answer:

PrivacyNotes started from a simple frustration: staying organized meant scattering your life across half a dozen apps, most of which could read everything you typed and billed you monthly for the privilege. We wanted one place for notes, tasks, journals, files, and passwords, encrypted so thoroughly that the people running the servers could not read a word of it, and paid for once rather than forever. So we built the encryption first, made the keys live only on your device, and published the crypto as open core so the promise could be checked, not just believed. Everything else grew from one rule: your data is yours, and no one else's to mine.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare ArrowOS and PrivacyNotes

ArrowOS Reviews

We have no reviews of ArrowOS yet.
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PrivacyNotes Reviews

  1. Feature rich

    The best thing about this: No subscription model, it's a one-time fee for a lifetime license. But you can start for free with the generous freemium model. I only needed to upgrade to pro because I wanted to use the app on my phone, laptop and desktop. Highly recommended! Btw, it's a perfect markdown editor as well, not sure why they don't emphasize this more.

Social recommendations and mentions

Based on our record, ArrowOS seems to be more popular. It has been mentiond 5 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ArrowOS mentions (5)

  • hello, I have this problem saying that my device isn't compatible, I have a Redmi K40 Gaming Edition so I suppose the hardware isn't the problem, any of you know what's wrong? The only way to play it is by apk?
    If you are that scared of it you could easily download another os on it like Arrow OS . Source: almost 4 years ago
  • Seeking opinions on what OP7P ROM to use
    ArrowOS 12 has been really reliable for me. Source: over 4 years ago
  • Best Android under 500โ‚ฌ, available in Netherlands?
    I get 7.5 hours screen on, 70 hours screen off running ArrowOS custom software and a battery at only 80% health... Source: over 4 years ago
  • I've got a Xiamoi smartphone, which OS would be best for me?
    Xiaomi poco x3 nfc I use Arrow OS vanilla version, fast, stable and clean, I routinely check it with pihole logs and sometimes with Wireshark and I've never seen anything alarming in regards to privacy since I switched to it 6 months ago. Source: over 4 years ago
  • Xiaomi POCO X3 Pro 8GB EU - Need Guidance to install ArrowOS Safely, Please
    I went on arrowos.net to do some research. There is different codenames under Poco headline and I have no idea which one is more stable. And guys I prefer to use google apps, so I guess I need the GAPPS build? oh and is GAPPS build stable or is there any bugs using google apps? Source: almost 5 years ago

PrivacyNotes mentions (0)

We have not tracked any mentions of PrivacyNotes yet. Tracking of PrivacyNotes recommendations started around Jun 2026.

What are some alternatives?

When comparing ArrowOS and PrivacyNotes, you can also consider the following products

crDroid - crDroid is designed to improve the performance, reliability and customizability of stock Android.

Standard Notes - A safe place for your notes, thoughts, and life's work

Pixel Experience - PixelExperience is an AOSP based ROM, with Google apps included and all Pixel goodies (launcher, wallpapers, icons, fonts, bootanimation).

Apple Notes - Apple Notes functions as a service for making short text notes.

Evolution X - #KeepEvolving!

Simplenote - The simplest way to keep notes. Light, clean, and free. Simplenote is now available for iOS, Android, Mac, and the web.