# Proofivy vs Causal Loop Diagram

The clearest difference is in-app purchases: Causal Loop Diagram at none against Proofivy's 2. Causal Loop Diagram also leads on iOS requirement (16.0 vs 18.0). Proofivy's advantage is device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. Proofivy sells 2 one-off in-app purchases. Causal Loop Diagram asks for nothing beyond the download.

Proofivy ships an update monthly, Causal Loop Diagram every 3 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Proofivy | Causal Loop Diagram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/proofivy/id6446280271/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 4 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Vision Pro** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cigeza B.V.](https://appshunter.io/developer/1677113586) | [seiji honda](https://appshunter.io/developer/1896430544) |

## What reviewers say

### Proofivy

[App page](https://appshunter.io/ios/app/proofivy/id6446280271)

Secure your intellectual property, copyright, and ideas with immutable, timestamped proof. Optionally monetize your creations by minting NFTs or publishing text content behind a stablecoin paywall.

**Highlights:** Irrefutable cryptographic proof of content, 100% privacy for your files, No crypto wallet required for blockchain verification, Optional x402 publishing with USDC earnings, Optional NFT minting on Optimism mainnet, Blockchain verification for tamper-proof records

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CID Commit | $1.99 | one-time |
| Message Commit | $3.99 | one-time |


### Causal Loop Diagram

[App page](https://appshunter.io/ios/app/causal-loop-diagram/id6769942289)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Proofivy free?

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

### Is Causal Loop Diagram free?

Causal Loop Diagram is free to download, with no in-app purchases.

### Do Proofivy or Causal Loop Diagram have ads?

Neither Proofivy nor Causal Loop Diagram shows ads.

### Which is updated more often, Proofivy or Causal Loop Diagram?

Proofivy ships an update monthly, and Causal Loop Diagram every 3 weeks. Most recently, Proofivy was updated on October 3, 2026 and Causal Loop Diagram on October 10, 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.*