# CZI Sound vs Drone Flight Time & Range

The clearest difference is in-app purchases: CZI Sound at none against Drone Flight Time & Range's 3. CZI Sound also leads on iOS requirement (13.0 vs 16.0). Drone Flight Time & Range's advantage is update cadence (every 2 months vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. Drone Flight Time & Range sells 3 in-app purchases, starting at $2.99 per month. CZI Sound asks for nothing beyond the download.

CZI Sound ships an update every 8 months, Drone Flight Time & Range every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | CZI Sound | Drone Flight Time & Range |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 64 MB | 9 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Chengzhi Intelligent Machine Technology Co., Ltd.](https://appshunter.io/developer/1675437495) | [HD YAPIMCILIK VE TEKNOLOJI ITHALAT IHRACAT TICARET LIMITED SIRKETI](https://appshunter.io/developer/1871741424) |

## What reviewers say

### CZI Sound

[App page](https://appshunter.io/ios/app/czi-sound/id6446013579)

**Features:** macOS Compatibility

**In-app purchases:** none


### Drone Flight Time & Range

[App page](https://appshunter.io/ios/app/drone-flight-time-and-range/id6796341153)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DroneFlight Pro — Monthly | $2.99 | per month |
| DroneFlight Pro — Yearly | $14.99 | per year |
| DroneFlight Pro — Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is CZI Sound free?

CZI Sound is free to download, with no in-app purchases.

### Is Drone Flight Time & Range free?

Drone Flight Time & Range is free to download, with in-app purchases available.

### Do CZI Sound or Drone Flight Time & Range have ads?

Neither CZI Sound nor Drone Flight Time & Range shows ads.

### Which is updated more often, CZI Sound or Drone Flight Time & Range?

CZI Sound ships an update every 8 months, and Drone Flight Time & Range every 2 months. Most recently, CZI Sound was updated on November 3, 2026 and Drone Flight Time & Range on November 3, 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.*