# 3demp vs Arduino BT Controller

The clearest difference is in-app purchases: 3demp at none against Arduino BT Controller's 1. 3demp also leads on ads (none vs shown) and iOS requirement (11.0 vs 18.2). Arduino BT Controller's advantage is update cadence (every 8 days vs every 10 months). On price and device support there is nothing between them.

Both are free to download. Arduino BT Controller sells 1 one-off in-app purchase. 3demp asks for nothing beyond the download.

3demp ships an update every 10 months, Arduino BT Controller every 8 days. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 3demp | Arduino BT Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/arduino-bt-controller/id6744121460/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 15 MB | 7 MB |
| Requires iOS | **11.0** | 18.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jang Heesu](https://appshunter.io/developer/469322291) | [Boyle Sim](https://appshunter.io/developer/1806031422) |

## What reviewers say

### 3demp

[App page](https://appshunter.io/ios/app/3demp/id1036158778)

**In-app purchases:** none


### Arduino BT Controller

[App page](https://appshunter.io/ios/app/arduino-bt-controller/id6744121460)

Control Arduino-based RC cars using Bluetooth 4.0. Customize button actions for real-time driving control. No login is needed for immediate use.

**Highlights:** Drive forward, backward, left, and right, Customizable button actions, Real-time Bluetooth communication, No login required

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is 3demp free?

3demp is free to download, with no in-app purchases.

### Is Arduino BT Controller free?

Arduino BT Controller is free to download, with in-app purchases available.

### Do 3demp or Arduino BT Controller have ads?

Arduino BT Controller shows ads; 3demp does not.

### Which is updated more often, 3demp or Arduino BT Controller?

3demp ships an update every 10 months, and Arduino BT Controller every 8 days. Most recently, 3demp was updated on October 5, 2026 and Arduino BT Controller on October 2, 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.*