Comparison

Self vs Opacity

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

Head to head
About

Self

This app provides a private and portable digital identity using zero-knowledge proofs. It allows users to prove their humanity and verify their identity across various applications without sharing unnecessary personal data, enhancing security and privacy in Web3 and beyond.

Highlights
  • zk Passport for secure sign-ins
  • Proof of Humanity verification
  • Web3 and DeFi access
  • Privacy-first data handling
  • One-tap verification
  • Aadhaar support (India)
Features
Read full description

Self is the privacy-first way to prove you're human and verify who you are online (or give your agent a secure identity), without handing over your personal data. Trusted by Google, Opera, and 15M+ users. Verify your real-world identity once using a biometric passport, biometric national ID cards, Aadhaar, or any other supported identity document. Once registered, you can prove the specific attributes services require, such as your humanity, age, or nationality, without ever disclosing the underlying document or your personal information. Key Features: PROOF OF HUMAN: Prove you're a real person rather than an automated or duplicate account. AGE VERIFICATION: Confirm you're over 18 (or any age threshold) without revealing your birthday. Built for social apps, marketplaces, and age-gated services. PRE-KYC: Verify your eligibility (age, country of residence, sanctions, etc.) before any KYC process, only sharing your personal information with companies and institutions once necessary. AGENT ID: Delegate your identity credentials to your autonomous agent, unlocking broader utility and access across the internet. PRIVACY BY DESIGN: Self is using the latest zero-knowledge technology, fully audited by the world’s best security experts. All data is stored locally on the user’s device — never on any servers. When a user verifies their identity, a verifiable credential is created and saved securely in the app. There’s no cloud storage, no centralized database, and no way for anyone - including Self - to access the data without the user's consent. "We’re committed to ensuring developers can build faster with reduced friction while maintaining industry‑leading security standards," said Rich Widmann, Google. "Integrating Self allows us to further this mission with frontier zero‑knowledge solutions." Why Self Defend against bots and duplicate identities Meet age and compliance requirements without surrendering personal information Carry one verified identity across the apps you use, instead of re-uploading documents at every sign-up Help establish a global standard for verified identity that keeps people, not platforms, in control of their data

About

Opacity

Securely store and manage your digital identity, including logins and credentials. Prove facts about yourself without revealing sensitive data, and share verified information with full transparency. Maintain control over your online presence and reputation.

Highlights
  • Private, verified identity vault
  • Store logins and credentials
  • Prove identity facts without data exposure
  • Share verified information transparently
  • Connect and manage accounts
  • Build online reputation
Features
Read full description

Opacity is your passport to a user-owned internet. Store your digital identity — logins, credentials, and connected accounts — in a private, verified vault that only you control. Prove facts about your identity without exposing your data. Opacity lets you verify who you are and what you’ve done while keeping your information private and secure. Share what you want — instantly, with full transparency into what’s being shared and with whom. You stay in control, whether you’re connecting accounts, proving your credentials, or porting your reputation across the internet. How it works: • Add accounts like GitHub, Spotify, and more • Verify data (e.g. commit history, top 1% listener) • Share proof anywhere — no need to reveal your full profile Own your identity. Build your reputation. Stay private.

Screenshots

Self4 screens
Opacity4 screens

Verdict

The call

The clearest difference is rating: Opacity at 5.0 against Self's 4.4. Self's advantage is ratings volume (25 vs 4) and iOS requirement (15.4 vs 17.0). 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Opacity holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Self has 25 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Self ships an update every 11 days, Opacity every 2 weeks. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Self versus Opacity: the parameters behind the verdict, then further details
ParameterSelfOpacity
PriceFreeFree
Rating4.4 (25 ratings)5.0 (4 ratings) — better
Positive reviews75.0% of reviews—
Number of ratings25 — better4
Update frequencyEvery 11 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS15.4 — better17.0
Further details — not scored
Size193 MB74 MB
Age rating4+4+
DeveloperProof of Passport, LLCOpacity Labs

Customer experience

Self

All ratings25 ratings
Positive84.0%
Neutral0.0%
Negative16.0%
Written reviews12 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Opacity

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Self

No in-app purchases

None

Opacity

No in-app purchases

Questions

Is Self free?
Self is free to download, with no in-app purchases.
Is Opacity free?
Opacity is free to download, with no in-app purchases.
Which has better reviews, Self or Opacity?
Opacity is rated higher. Self averages 4.4 out of 5 from 25 ratings, while Opacity averages 5.0 from 4 ratings.
Do Self or Opacity have ads?
Neither Self nor Opacity shows ads.
Which is updated more often, Self or Opacity?
Self ships an update every 11 days, and Opacity every 2 weeks. Most recently, Self was updated on October 19, 2026 and Opacity on October 24, 2026.

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