# SigmaNote vs Gridflo

The clearest difference is in-app purchases: Gridflo at none against SigmaNote's 4. Gridflo also leads on iOS requirement (16.4 vs 18.0). SigmaNote's advantage is update cadence (weekly vs monthly). 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. Gridflo asks for nothing beyond the download.

SigmaNote ships an update weekly, Gridflo monthly. The most recent releases landed on November 5, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | SigmaNote | Gridflo |
| --- | --- | --- |
| 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** | Monthly |
| Monetization | Freemium | — |
| Size | 90 MB | 61 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SignifyID LLC](https://appshunter.io/developer/1793292360) | [Mohamed El Beshlawi](https://appshunter.io/developer/1845525663) |

## 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 |


### Gridflo

[App page](https://appshunter.io/ios/app/gridflo/id6753890159)

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

**In-app purchases:** none


## Frequently asked questions

### Is SigmaNote free?

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

### Is Gridflo free?

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

### Do SigmaNote or Gridflo have ads?

Neither SigmaNote nor Gridflo shows ads.

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

SigmaNote ships an update weekly, and Gridflo monthly. Most recently, SigmaNote was updated on November 5, 2026 and Gridflo on November 12, 2026.

---

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