Polygon ID vs Greeting Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polygon ID
Create and manage your self-sovereign digital identity. Prove access rights and reputation privately using zero-knowledge cryptography. Access web3 and web2 services with secure, private on-chain verifications.
- Create and manage digital identity
- Prove access rights privately
- Manage verifiable claims
- Generate private proofs
- Secure authentication (biometrics/PIN)
- Identity recovery with seed phrase
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Polygon ID enables you to create and manage your own self-sovereign digital identity. Prove your access rights and reputation without revealing any of your personal information. Manage verifiable claims about your identity and generate private proofs for digital interactions. Polygon ID is an open-source and private by default identity system based on zero-knowledge cryptography (zkSNARK). With the Polygon ID app, you will have access to web3 and web2 services and the ability for private on-chain verifications. Convenient control: - Secure authentication with biometrics or a 6-digit PIN - Identity recovery with seed phrase mechanism Obtaining claims: - Scan an issuer’s QR code - Follow the steps to connect your identity with the issuer and retrieve your claims - Store and manage your claims from your wallet Presenting your private proofs: - Scan a verifier’s QR code - Accept the proof request presented in your wallet - Generate and share the private proof of your claims with the verifier.
Greeting Tracker
Manage and cherish special moments with this digital companion for tracking and celebrating occasions like birthdays and holidays. Create a personalized card library, a sentimental journal, and generate printable sheets of past shared cards.
- Personalized card library
- Digital gallery of cards
- Sentimental journal for past gifts
- Printable card sheets per person
- Track cards sent over time
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Transform your gifting experience with Greeting Tracker, the ultimate digital companion to manage and cherish your special moments! Whether it's birthdays, anniversaries, holidays, or just because, this innovative app helps you track and celebrate every occasion. **Key Features:** • **Personalized Card Library**: Curate your favorite greeting cards across various occasions. • **Gallery & Favorites**: Create a beautiful digital gallery of your cherished cards. • **Sentimental Journal**: Reflect on past gifts by tracking how many cards you've sent over time. • **Printable Cards**: Generate simple, printable sheets for each person, highlighting all the lovely cards you've shared with them over the years. **Upgrade Your Gifting Experience:** With Greeting Tracker, you'll never forget a special occasion or lose track of your favorite greeting cards. This app is perfect for: • Gift givers who want to make their cards extra special • Card collectors and enthusiasts • Those who appreciate sentimental gestures Download Greeting Tracker today and elevate your gift-giving experience!
Screenshots
Verdict
The clearest difference is price: Polygon ID at Free against Greeting Tracker's $3.99. Polygon ID also leads on review sentiment (100% vs 75%) and ratings volume (7 vs 1). Greeting Tracker's advantage is rating (5.0 vs 4.3). On update cadence, ads, in-app purchases and device support 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
Polygon ID is free to download; Greeting Tracker costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Greeting Tracker holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Polygon ID has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of Polygon ID's written reviews are positive against 75% of Greeting Tracker's, so the app with the better star average is not the one people write more warmly about.
Polygon ID ships an update every 3 weeks, Greeting Tracker monthly. The most recent releases landed on September 24, 2026 and October 1, 2026 respectively.
| Parameter | Polygon ID | Greeting Tracker |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.3 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 75.0% of reviews |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 14.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 156 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | ZKID Labs AG | Michael Rowe |
Customer experience
Polygon ID
Greeting Tracker
In-app purchases
Polygon ID
No in-app purchases
Greeting Tracker
No in-app purchases









