# sigmaABC vs Agrow Notes

The clearest difference is in-app purchases: sigmaABC at none against Agrow Notes's 3. sigmaABC also leads on iOS requirement (15.5 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Agrow Notes sells 3 in-app purchases, starting at $8.99 per month. sigmaABC asks for nothing beyond the download.

sigmaABC ships an update every 2 weeks, Agrow Notes every 9 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | sigmaABC | Agrow Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Size | 76 MB | 41 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fundação ABC](https://appshunter.io/developer/1253447077) | [Harvest Apps Ltda](https://appshunter.io/developer/1733113854) |

## What reviewers say

### sigmaABC

[App page](https://appshunter.io/ios/app/sigmaabc/id6748761818)

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

**In-app purchases:** none


### Agrow Notes

[App page](https://appshunter.io/ios/app/agrow-notes-farm-logbook/id6814509238)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Agro Notes Pro - Monthly | $8.99 | per month |
| Agro Notes Pro - Annual | $79.99 | per year |
| Agro Notes Pro - Lifetime | $159.99 | one-time |


## Frequently asked questions

### Is sigmaABC free?

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

### Is Agrow Notes free?

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

### Do sigmaABC or Agrow Notes have ads?

Neither sigmaABC nor Agrow Notes shows ads.

### Which is updated more often, sigmaABC or Agrow Notes?

sigmaABC ships an update every 2 weeks, and Agrow Notes every 9 days. Most recently, sigmaABC was updated on November 3, 2026 and Agrow Notes on November 6, 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.*