# SimfyAI Data vs Proof

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.

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.

## The numbers

| Metric | SimfyAI Data | Proof |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/proof-vault/id6761130234/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2.2 GB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yanxu Xie](https://appshunter.io/developer/1449703818) | [James Cuadros](https://appshunter.io/developer/1887926736) |

## What reviewers say

### SimfyAI Data

[App page](https://appshunter.io/ios/app/simfyai-data/id6670199269)

**Features:** macOS Compatibility

**In-app purchases:** none


### Proof

[App page](https://appshunter.io/ios/app/proof-vault/id6761130234)

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.

**Highlights:** Tamper-evident timestamped records, Cryptographic hashing for integrity, Photo and video documentation, GPS location and notes, Verifiable PDF export, Secure sharing options, Acknowledgment requests

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proof Plus | $2.99 | one-time |
| Proof Pro | $7.99 | one-time |


## Frequently asked questions

### Is SimfyAI Data free?

SimfyAI Data is free to download, with no in-app purchases.

### Is Proof free?

Proof is free to download, with in-app purchases available.

### Do SimfyAI Data or Proof have ads?

Neither SimfyAI Data nor Proof shows ads.

### Which is updated more often, SimfyAI Data or Proof?

SimfyAI Data ships an update monthly, and Proof every 2 days. Most recently, SimfyAI Data was updated on October 27, 2026 and Proof on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*