# Lotto Engine 2D vs Airro E6B

The clearest difference is price: Lotto Engine 2D at Free against Airro E6B's $1.99. Lotto Engine 2D also leads on update cadence (every 5 weeks vs every 40 months) and iOS requirement (13.0 vs 16.1). Airro E6B's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Lotto Engine 2D is free to download; Airro E6B costs $1.99 up front. Lotto Engine 2D sells 1 one-off in-app purchase. Airro E6B asks for nothing beyond the download.

Lotto Engine 2D ships an update every 5 weeks, Airro E6B every 40 months. The most recent releases landed on July 6, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Lotto Engine 2D | Airro E6B |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.6 (14 ratings)](https://appshunter.io/ios/app/lotto-engine-2d/id1638054406/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 40 months |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 1 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [何均 邓](https://appshunter.io/developer/1621073530) | [Christian van der Meij](https://appshunter.io/developer/571706052) |

## What reviewers say

### Lotto Engine 2D

[App page](https://appshunter.io/ios/app/lotto-engine-2d/id1638054406)

This app generates random numbers using a physics-based simulation of balls in a container. Personalize your experience by selecting favorite numbers and enjoy a fun, easy-to-use random number picker.

**Highlights:** Physics-based 2D/3D ball simulation, Random number generation, Customizable settings, Favorite number selection, Easy to use interface

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $1.99 | one-time |


### Airro E6B

[App page](https://appshunter.io/ios/app/airro-e6b/id6444861966)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lotto Engine 2D free?

Lotto Engine 2D is free to download, with in-app purchases available.

### Is Airro E6B free?

Airro E6B costs $1.99, with no in-app purchases.

### Do Lotto Engine 2D or Airro E6B have ads?

Neither Lotto Engine 2D nor Airro E6B shows ads.

### Which is updated more often, Lotto Engine 2D or Airro E6B?

Lotto Engine 2D ships an update every 5 weeks, and Airro E6B every 40 months. Most recently, Lotto Engine 2D was updated on July 6, 2026 and Airro E6B on September 12, 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.*