# smartctr vs TJDZ

The clearest difference is iOS requirement: TJDZ at 12.0 against smartctr's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 15, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | smartctr | TJDZ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (10 ratings)](https://appshunter.io/ios/app/smartctr/id1535913329/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 7 MB | 33 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [爽 余](https://appshunter.io/developer/1534844232) | [Guangzhou Tianjian Automotive Products Co., Ltd](https://appshunter.io/developer/1716284778) |

## What reviewers say

### smartctr

[App page](https://appshunter.io/ios/app/smartctr/id1535913329)

This app provides intelligent remote control for pickup truck roller shutters and carriage LED lights. It enables automatic switching of these features for convenient operation.

**Highlights:** Remote control for roller shutters, Automatic roller shutter switch, Control carriage LED lights, Automatic LED light switch

**Features:** macOS Compatibility

**In-app purchases:** none


### TJDZ

[App page](https://appshunter.io/ios/app/tjdz/id6471932553)

**In-app purchases:** none


## Frequently asked questions

### Is smartctr free?

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

### Is TJDZ free?

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

### Do smartctr or TJDZ have ads?

Neither smartctr nor TJDZ shows ads.

### Which is updated more often, smartctr or TJDZ?

smartctr ships an update every 2 months, and TJDZ every 2 months. Most recently, smartctr was updated on September 15, 2026 and TJDZ on September 8, 2026.

---

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