SimfyAI Data vs Proof
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimfyAI Data
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Discover the Value of Your Data and Take Control of the Analysis Process. Our app is a locally-hosted, private data analysis tool designed exclusively for iOS. It fully protects your privacy—your data never passes through any third party, and we do not collect any of your information. Performing basic analyses with simple taps and inputs
Proof
Create tamper-evident, timestamped records of important events. Capture photos or videos with notes, and the app seals them with a cryptographic hash, making alterations virtually impossible. Generate verifiable PDF reports and share them securely.
- Tamper-evident timestamped records
- Cryptographic hashing for integrity
- Photo and video documentation
- GPS location and notes
- Verifiable PDF export
- Secure sharing options
- Acknowledgment requests
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If it happened, prove it. Proof creates tamper-evident, timestamped records of anything you need to document. Take a photo or video, add notes, and Proof seals it with a cryptographic hash — a unique digital fingerprint that makes it virtually impossible to alter the record after the fact. Whether you're photographing an apartment before moving in, documenting a car accident, recording an agreement, or tracking the condition of something you're lending — Proof gives you a credible, shareable record with a verifiable timestamp. What makes Proof different Every proof is sealed with a SHA-256 cryptographic hash computed from your photos, videos, timestamp, GPS location, and notes. If any detail changes after sealing, the hash won't match — making tampering obvious. A hash chain links each proof to the one before it, creating a lightweight audit trail across your entire vault. Built for real situations • Move-in and move-out apartment photos • Car accident and property damage documentation • Item condition records before and after lending • Agreements and acknowledgment tracking • Workplace incident reports • Online marketplace sales and shipping evidence • Generate a professional PDF export containing your photos, full metadata, GPS location, cryptographic hash, and a QR code for easy verification. • Share via AirDrop, text, or email. • Request acknowledgment — recipients can confirm receipt via a secure link, and you'll receive a push notification when they do. Your data stays on your device No account required. No cloud sync. No tracking. Everything lives on your device unless you explicitly choose to share it.
Screenshots
Verdict
The clearest difference is in-app purchases: SimfyAI Data at none against Proof's 2. Proof's advantage is update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement 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
Both are free to download. Proof sells 2 one-off in-app purchases. SimfyAI Data asks for nothing beyond the download.
SimfyAI Data ships an update monthly, Proof every 2 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.
| Parameter | SimfyAI Data | Proof |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2.2 GB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Yanxu Xie | James Cuadros |
In-app purchases
SimfyAI Data
No in-app purchases
Proof
- Proof Plus$2.99
- Proof Pro$7.99









