# The Number Line vs DA0

The clearest difference is in-app purchases: The Number Line at none against DA0's 3. DA0's advantage is ads (none vs shown) and update cadence (every 3 months vs every 21 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. DA0 sells 3 in-app purchases, starting at $3.99 per month. The Number Line asks for nothing beyond the download.

The Number Line ships an update every 21 months, DA0 every 3 months. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | The Number Line | DA0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/the-number-line/id1611914396/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 21 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 9 MB | 27 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### The Number Line

[App page](https://appshunter.io/ios/app/the-number-line/id1611914396)

This app allows users to visualize numbers on a number line and calculate the absolute difference between two numbers. It functions offline, making it accessible anytime and anywhere. Designed for ease of use and speed, it aims to be a go-to math tool.

**Highlights:** Number line visualization, Absolute difference calculator, Offline functionality, Intuitive interface, Fast operation, Supports positive and negative numbers

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

**In-app purchases:** none


### DA0

[App page](https://appshunter.io/ios/app/da0-001-data-analytics-prep/id6761255165)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $14.99 | per year |
| Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is The Number Line free?

The Number Line is free to download, with no in-app purchases.

### Is DA0 free?

DA0 is free to download, with in-app purchases available.

### Do The Number Line or DA0 have ads?

The Number Line shows ads; DA0 does not.

### Which is updated more often, The Number Line or DA0?

The Number Line ships an update every 21 months, and DA0 every 3 months. Most recently, The Number Line was updated on October 15, 2026 and DA0 on October 14, 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.*