# SigmaNote vs viaSocket

The clearest difference is in-app purchases: viaSocket at none against SigmaNote's 4. viaSocket also leads on iOS requirement (15.1 vs 18.0). SigmaNote's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. SigmaNote sells 4 in-app purchases, starting at $8.99 per month. viaSocket asks for nothing beyond the download.

SigmaNote ships an update weekly, viaSocket every 2 months. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SigmaNote | viaSocket |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigmanote/id6744374542/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Freemium | — |
| Size | 90 MB | 27 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SignifyID LLC](https://appshunter.io/developer/1793292360) | [Walkover Web Solutions Private Limited](https://appshunter.io/developer/793737585) |

## What reviewers say

### 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 |


### viaSocket

[App page](https://appshunter.io/ios/app/viasocket/id6747973057)

**In-app purchases:** none


## Frequently asked questions

### Is SigmaNote free?

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

### Is viaSocket free?

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

### Do SigmaNote or viaSocket have ads?

Neither SigmaNote nor viaSocket shows ads.

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

SigmaNote ships an update weekly, and viaSocket every 2 months. Most recently, SigmaNote was updated on October 17, 2026 and viaSocket on October 13, 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.*