# Convertly vs DroneCJ

The clearest difference is update cadence: Convertly at every 4 days against DroneCJ's every 3 weeks. DroneCJ's advantage is iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Convertly sells 1 one-off in-app purchase and DroneCJ sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Convertly ships an update every 4 days, DroneCJ every 3 weeks. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Convertly | DroneCJ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 5 MB | 103 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Avi Shany](https://appshunter.io/developer/1768441278) | [Julien Cecconi](https://appshunter.io/developer/1836636742) |

## What reviewers say

### Convertly

[App page](https://appshunter.io/ios/app/convertly-unit-converter/id6748157020)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Categories | $1.99 | one-time |


### DroneCJ

[App page](https://appshunter.io/ios/app/dronecj/id6751755255)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DroneCJ Plus Monthly | $3.99 | per month |
| DroneCJ Plus Yearly | $44.99 | per year |


## Frequently asked questions

### Is Convertly free?

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

### Is DroneCJ free?

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

### Do Convertly or DroneCJ have ads?

Neither Convertly nor DroneCJ shows ads.

### Which is updated more often, Convertly or DroneCJ?

Convertly ships an update every 4 days, and DroneCJ every 3 weeks. Most recently, Convertly was updated on October 24, 2026 and DroneCJ on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*