# Proofivy vs SigmaNote

The clearest difference is update cadence: SigmaNote at weekly against Proofivy's monthly. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Proofivy sells 2 one-off in-app purchases and SigmaNote sells 4 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Proofivy against 5.0 for SigmaNote. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Proofivy ships an update monthly, SigmaNote weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Proofivy | SigmaNote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/proofivy/id6446280271/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sigmanote/id6744374542/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 16 MB | 90 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cigeza B.V.](https://appshunter.io/developer/1677113586) | [SignifyID LLC](https://appshunter.io/developer/1793292360) |

## 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 |


### SigmaNote

[App page](https://appshunter.io/ios/app/sigmanote/id6744374542)

This app acts as an AI-powered knowledge hub, allowing users to capture, manage, learn from, and create knowledge across various formats. It uses AI agents to organize content, answer questions, and facilitate voice-driven writing and content creation.

**Highlights:** Capture knowledge from diverse sources, AI agents for organization and retrieval, Learn through conversation and listening, Voice-driven AI writing and content creation, Unified knowledge lifecycle management, Cross-format knowledge integration

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SigmaNote Premium Monthly | $8.99 | per month |
| SigmaNote Premium Plus Monthly | $12.99 | per month |
| SigmaNote Premium Yearly | $80.99 | per year |
| SigmaNote Premium Plus Yearly | $116.99 | per year |


## Frequently asked questions

### Is Proofivy free?

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

### Is SigmaNote free?

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

### Which has better reviews, Proofivy or SigmaNote?

Proofivy and SigmaNote are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Proofivy or SigmaNote have ads?

Neither Proofivy nor SigmaNote shows ads.

### Which is updated more often, Proofivy or SigmaNote?

Proofivy ships an update monthly, and SigmaNote weekly. Most recently, Proofivy was updated on October 24, 2026 and SigmaNote on October 24, 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.*