# DLR eFlight vs Audio Maths

The clearest difference is in-app purchases: DLR eFlight at none against Audio Maths's 2. DLR eFlight also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Audio Maths sells 2 in-app purchases, starting at $3.99 per month. DLR eFlight asks for nothing beyond the download.

DLR eFlight ships an update every 2 days, Audio Maths every 2 weeks. The most recent releases landed on September 20, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | DLR eFlight | Audio Maths |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 388 MB | 11 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DLR German Aerospace Center e.V.](https://appshunter.io/developer/418202933) | [Felix Desiderato](https://appshunter.io/developer/1742514874) |

## What reviewers say

### DLR eFlight

[App page](https://appshunter.io/ios/app/dlr-eflight/id1552361763)

**In-app purchases:** none


### Audio Maths

[App page](https://appshunter.io/ios/app/audio-maths/id6754295502)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $3.99 | per month |
| Lifetime Access | $5.99 | one-time |


## Frequently asked questions

### Is DLR eFlight free?

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

### Is Audio Maths free?

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

### Do DLR eFlight or Audio Maths have ads?

Neither DLR eFlight nor Audio Maths shows ads.

### Which is updated more often, DLR eFlight or Audio Maths?

DLR eFlight ships an update every 2 days, and Audio Maths every 2 weeks. Most recently, DLR eFlight was updated on September 20, 2026 and Audio Maths on September 15, 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.*