# AddNotes vs SimpleSigma

The clearest difference is update cadence: AddNotes at every 10 days against SimpleSigma's every 6 weeks. AddNotes also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AddNotes sells 2 in-app purchases, starting at $2.99 per month and SimpleSigma sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

AddNotes ships an update every 10 days, SimpleSigma every 6 weeks. The most recent releases landed on September 1, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | AddNotes | SimpleSigma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (365 ratings)](https://appshunter.io/ios/app/addnotes/id1254890578/reviews)** | — |
| Number of ratings | **365** | — |
| Positive reviews | 87.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 7 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Climb App](https://appshunter.io/developer/404048459) | [MUTSUAKI KIKUCHI](https://appshunter.io/developer/1874283283) |

## What reviewers say

### AddNotes

[App page](https://appshunter.io/ios/app/addnotes/id1254890578)

This app combines note-taking with automatic calculation. Input data and numbers, and it will instantly compute totals for you. It's versatile for managing various data items and calculations.

**Highlights:** Integrates notes and calculator, Automatic total calculation, Supports Dynamic Type, Compatible with hardware keyboards, Manages various data items

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $2.99 | per month |
| Premium yearly | $29.99 | per year |


### SimpleSigma

[App page](https://appshunter.io/ios/app/simplesigma/id1522264347)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SimpleSigma Pro (Monthly) | $2.99 | per month |
| SimpleSigma Pro (Yearly) | $29.99 | per year |


## Frequently asked questions

### Is AddNotes free?

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

### Is SimpleSigma free?

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

### Do AddNotes or SimpleSigma have ads?

Both AddNotes and SimpleSigma show ads.

### Which is updated more often, AddNotes or SimpleSigma?

AddNotes ships an update every 10 days, and SimpleSigma every 6 weeks. Most recently, AddNotes was updated on September 1, 2026 and SimpleSigma on September 11, 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.*