Comparison

SkyMarks vs Proton Authenticator

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

Head to head
About

SkyMarks

This app helps you save and organize posts from the Bluesky social media platform. It allows you to bookmark content from your browser and access it later across all your Apple devices. Features include searching by text, author, or image content, and organizing bookmarks with tags.

Highlights
  • Bookmark Bluesky posts
  • Cross-device synchronization
  • Search by text, author, or image
  • Tagging and filtering
  • Organize bookmarked content
Read full description

SkyMarks is the Bluesky bookmarks app for your iPhone, iPad and Mac. Bluesky is the biggest thing happening in social media in 2025. It seems like everyone is jumping on board, with over 31 million users as of February. When you jump in, though, you may find some things that you miss from your old social networks, like the ability to bookmark a post. It’s a common thing to want to save a post to come back to later. Maybe you want to think a while before responding. Maybe the post has a useful link in it that you want to come back to. Or maybe you just really like the post and want to keep it around. Until Bluesky decides to implement bookmarking itself, SkyMarks can be your Bluesky bookmark manager. To bookmark a post from your browser, just tap the share button (the button with the arrow pointing out of a box) and then select SkyMarks from the list of available options. Once you’ve bookmarked a post, it will be available in SkyMarks whenever you need it. SkyMarks synchs its bookmarks across all your devices that use the same Apple ID. So if you bookmark a post while you’re waiting in line at the grocery store, you’ll find it on your iPad when you’re reading in your living room or your Mac when you’re working at your desk. SkyMarks has robust features to find bookmarked posts. You can search by post text, author name, author handle or even your own notes. You can even search the text in images attached to posts you’ve bookmarked! You can also tag bookmarks and view bookmarks by tag, so you can use SkyMarks for multiple projects and still get to the bookmarks you need when you need them. SkyMarks is free to use and has no in-app purchases. It’s just here to make the transition to Bluesky a little easier for you. If you find a bug or want a feature, please provide feedback. SkyMarks will hopefully one day be open-source. There are a few issues that need to be figured out before its code is released to the public though.

About

Proton Authenticator

Securely manage your two-factor authentication codes with an open-source, end-to-end encrypted authenticator app. It offers seamless cross-device syncing, effortless import from other apps, and robust backup options, all protected by strict Swiss privacy laws. Take control of your digital security with a trusted and private solution.

Highlights
  • End-to-end encrypted iCloud sync
  • Effortless import from other authenticators
  • Secure backup and export
  • Swiss privacy by design
  • Open source and transparent
  • Offline support
Features
Read full description

Get the authenticator trusted by millions — from Proton Mail, the world's largest encrypted email provider. Proton Authenticator is open source, end-to-end encrypted, and protected by strict Swiss privacy laws. Protect all your new accounts and strengthen security on your existing ones. Proton Authenticator keeps your 2FA codes secure, accessible, and completely private — with full control over where your data is stored. KEY FEATURES Local-First Storage:Your 2FA codes are stored entirely on your device, giving you complete control over your data. Effortless Import: Migrate from Google Authenticator, Authy, or any other app in seconds. Secure Backup & Export: Retain full control of your data with easy backup and restore options. Swiss Privacy by Design: Built under Switzerland's strongest data protection regulations. Open Source & Transparent: Auditable code. No tracking. No ads. Take control of your digital security with encryption you can trust. Free to use: No Proton account required, ad-free. Offline support: On mobile and desktop apps No other 2FA app provides this combination of security and privacy. Trusted by millions. Built by Proton. Take control of your digital security today. Terms of service: https://proton.me/legal/terms Learn more: https://proton.me

Screenshots

SkyMarks4 screens
Proton Authenticator4 screens

Verdict

The call

The clearest difference is rating: SkyMarks at 5.0 against Proton Authenticator's 4.4. Proton Authenticator's advantage is ratings volume (242 vs 2). 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SkyMarks holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Proton Authenticator has 242 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

SkyMarks ships an update every 5 days, Proton Authenticator weekly. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
SkyMarks versus Proton Authenticator: the parameters behind the verdict, then further details
ParameterSkyMarksProton Authenticator
PriceFreeFree
Rating5.0 (2 ratings) — better4.4 (242 ratings)
Positive reviews—55.7% of reviews
Number of ratings2242 — better
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, MaciPhone, iPad, Apple Watch
Requires iOS17.617.0 — better
Further details — not scored
Size13 MB119 MB
Age rating4+4+
DeveloperOld Jewel SoftwareProton AG

Customer experience

SkyMarks

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Proton Authenticator

All ratings242 ratings
Positive82.2%
Neutral7.4%
Negative10.3%
Written reviews244 reviews
Positive55.7%
Neutral20.5%
Negative23.8%

Bugs and requests

SkyMarks

Not enough reviews yet to summarise bugs or requests.

Proton Authenticator

Reported bugs

4 issues
  • Sync/login loop on iPad
  • 2FA input broken on non-iPhone devices
  • Screen strobing on iPad
  • Duplicate entries after import

Requested features

5 requests
  • PIN unlock for desktop
  • Alphabetical sorting option
  • Export function (not just Proton-specific backup)
  • Native macOS app
  • Option to hide item icons

In-app purchases

None

SkyMarks

No in-app purchases

None

Proton Authenticator

No in-app purchases

Questions

Is SkyMarks free?
SkyMarks is free to download, with no in-app purchases.
Is Proton Authenticator free?
Proton Authenticator is free to download, with no in-app purchases.
Which has better reviews, SkyMarks or Proton Authenticator?
SkyMarks is rated higher. SkyMarks averages 5.0 out of 5 from 2 ratings, while Proton Authenticator averages 4.4 from 242 ratings.
Do SkyMarks or Proton Authenticator have ads?
Neither SkyMarks nor Proton Authenticator shows ads.
Which is updated more often, SkyMarks or Proton Authenticator?
SkyMarks ships an update every 5 days, and Proton Authenticator weekly. Most recently, SkyMarks was updated on October 3, 2026 and Proton Authenticator on October 12, 2026.

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