Comparison

COSAction 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

COSAction

Empower grassroots activists with tools to connect with state legislators and build local support teams. Access news, track legislative actions, and utilize a phone outreach tool to advance constitutional amendments.

Highlights
  • Legislator contact tools
  • Volunteer team building
  • News articles
  • Action reports
  • Notifications
  • Phone outreach tool
Read full description

COSAction provides information and tools for self-governing grassroots activists to engage with their state legislators, and to build a team of educated and engaged volunteers and supporters in their local district. This app is available for anyone who is a supporter of Convention of States Project. Its goal is to have its resolution passed in at least 34 states, to call for a Convention of States to propose amendments to the US Constitution, which fall within one of 3 subject matters, 1) fiscal restraints, 2) term limits, or 3) reduce scope and jurisdiction of the Federal government. The Mission of Convention of States Project is to "Build an engaged army of self-governing grassroots activists". The Aspirational Goals are: - The people organize and restore representative government as defined in our written Constitution. - Restore a culture of self-governance in America. - Inspire a political and spiritual awakening in America. Current features of the app include: - News articles - Action reports for contacts with legislators - Notifications - TelePatriot phone outreach tool - Leadership directory

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

COSAction4 screens
Proton Authenticator4 screens

Verdict

The call

The clearest difference is review sentiment: COSAction at 100% against Proton Authenticator's 56%. COSAction also leads on rating (4.9 vs 4.4) and iOS requirement (10.0 vs 17.0). Proton Authenticator's advantage is ratings volume (242 vs 10) and update cadence (weekly vs fortnightly). On price, ads, in-app purchases and monetization model 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

COSAction holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Proton Authenticator has 242 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 100% of COSAction's written reviews are positive against 56% of Proton Authenticator's.

UpkeepUpdate frequency

COSAction ships an update fortnightly, Proton Authenticator weekly. The most recent releases landed on June 1, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
COSAction versus Proton Authenticator: the parameters behind the verdict, then further details
ParameterCOSActionProton Authenticator
PriceFreeFree
Rating4.9 (10 ratings) — better4.4 (242 ratings)
Positive reviews100.0% of reviews — better56.3% of reviews
Number of ratings10242 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS10.0 — better17.0
Further details — not scored
Size39 MB119 MB
Age rating4+4+
DeveloperCitizens for Self-GovernanceProton AG

Customer experience

COSAction

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Proton Authenticator

All ratings242 ratings
Positive82.2%
Neutral7.4%
Negative10.3%
Written reviews231 reviews
Positive56.3%
Neutral20.8%
Negative22.9%

Bugs and requests

COSAction

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

COSAction

No in-app purchases

None

Proton Authenticator

No in-app purchases

Questions

Is COSAction free?
COSAction 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, COSAction or Proton Authenticator?
COSAction is rated higher. COSAction averages 4.9 out of 5 from 10 ratings, while Proton Authenticator averages 4.4 from 242 ratings.
Do COSAction or Proton Authenticator have ads?
Neither COSAction nor Proton Authenticator shows ads.
Which is updated more often, COSAction or Proton Authenticator?
COSAction ships an update fortnightly, and Proton Authenticator weekly. Most recently, COSAction was updated on June 1, 2026 and Proton Authenticator on October 1, 2026.

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