# Proofivy vs Doodle Blackboard

The clearest difference is in-app purchases: Doodle Blackboard at none against Proofivy's 2. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Proofivy | Doodle Blackboard |
| --- | --- | --- |
| 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 | — |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad, Vision Pro | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Cigeza B.V.](https://appshunter.io/developer/1677113586) | [Myworkingmemory LLC](https://appshunter.io/developer/1892099684) |

## 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 |


### Doodle Blackboard

[App page](https://appshunter.io/ios/app/doodle-blackboard/id6800838564)

**In-app purchases:** none


## Frequently asked questions

### Is Proofivy free?

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

### Is Doodle Blackboard free?

Doodle Blackboard is free to download, with no in-app purchases.

### Do Proofivy or Doodle Blackboard have ads?

Neither Proofivy nor Doodle Blackboard shows ads.

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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.*