# D vs FlySafe! ObstacleDetect

The clearest difference is review sentiment: FlySafe! ObstacleDetect at 100% against D's 62%. D's advantage is monetization model (free with in-app purchases vs subscription). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. D sells 5 in-app purchases, starting at $1.99 per month and FlySafe! ObstacleDetect sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

D ships an update every 5 weeks, FlySafe! ObstacleDetect every 4 weeks. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | D | FlySafe! ObstacleDetect |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 62.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 48 MB | 67 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [D-Space SRLS](https://appshunter.io/developer/1754384147) | [Daniele Tona](https://appshunter.io/developer/1094664233) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-space/id1451799437)

Plan and execute safe, compliant drone flights across Italy and Europe. Access real-time maps, airspace data, and weather information. Manage flight authorizations and store documents securely.

**Highlights:** Real-time interactive map with airspace data, Official, continuously updated flight information, Airsense aircraft detection, Live weather radar and forecasts, Automatic flight permit requests, Cloud archive for flight documents

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Quarterly subscription | $3.99 | per 3 months |
| Six-monthly subscription | $8.99 | per 6 months |
| Annual subscription | $17.99 | per year |
| ATM-05 automatic filling | $1.99 | one-time |


### FlySafe! ObstacleDetect

[App page](https://appshunter.io/ios/app/flysafe-obstacledetect/id6468930786)

This app provides real-time obstacle detection for flights, offering visual and acoustic alerts up to 30 seconds before potential collisions. It features a continuously updated database of hazards and allows users to contribute to its accuracy.

**Highlights:** Visual and acoustic obstacle alerts, Up to 30-second pre-impact warnings, Continuously updated obstacle database, Location sharing, Real-time flight graph, Flight recorder and data sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $4.99 | per month |
| Quarterly subscription | $12.99 | per 3 months |
| Annual subscription | $44.99 | per year |


## Frequently asked questions

### Is D free?

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

### Is FlySafe! ObstacleDetect free?

FlySafe! ObstacleDetect is free to download, with in-app purchases available.

### Do D or FlySafe! ObstacleDetect have ads?

Neither D nor FlySafe! ObstacleDetect shows ads.

### Which is updated more often, D or FlySafe! ObstacleDetect?

D ships an update every 5 weeks, and FlySafe! ObstacleDetect every 4 weeks. Most recently, D was updated on September 21, 2026 and FlySafe! ObstacleDetect on June 1, 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.*