# Fountain Notes vs Sigma Notepad Calculator

The clearest difference is in-app purchases: Fountain Notes at none against Sigma Notepad Calculator's 3. Fountain Notes also leads on update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. Fountain Notes asks for nothing beyond the download.

Fountain Notes ships an update every 4 days, Sigma Notepad Calculator every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Fountain Notes | Sigma Notepad Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 1 MB | 18 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Brandon Wilson](https://appshunter.io/developer/1847630318) | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) |

## What reviewers say

### Fountain Notes

[App page](https://appshunter.io/ios/app/fountain-notes/id6766614270)

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

**In-app purchases:** none


### Sigma Notepad Calculator

[App page](https://appshunter.io/ios/app/sigma-notepad-calculator/id6768903761)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Fountain Notes free?

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

### Is Sigma Notepad Calculator free?

Sigma Notepad Calculator is free to download, with in-app purchases available.

### Do Fountain Notes or Sigma Notepad Calculator have ads?

Neither Fountain Notes nor Sigma Notepad Calculator shows ads.

### Which is updated more often, Fountain Notes or Sigma Notepad Calculator?

Fountain Notes ships an update every 4 days, and Sigma Notepad Calculator every 2 weeks. Most recently, Fountain Notes was updated on October 28, 2026 and Sigma Notepad Calculator on October 31, 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.*