# D.T.C. Viewer vs Vehicle Reservation System

The clearest difference is update cadence: Vehicle Reservation System at monthly against D.T.C. Viewer's every 11 months. D.T.C. Viewer's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

D.T.C. Viewer ships an update every 11 months, Vehicle Reservation System monthly. The most recent releases landed on October 26, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | D.T.C. Viewer | Vehicle Reservation System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Size | 14 MB | 38 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [YANG SHU-CHAO](https://appshunter.io/developer/784264853) | [WISAWAKAM SOFTWARE COMPANY LIMITED](https://appshunter.io/developer/1661052063) |

## What reviewers say

### D.T.C. Viewer

[App page](https://appshunter.io/ios/app/dtc-viewer/id1148840143)

**Features:** macOS Compatibility

**In-app purchases:** none


### Vehicle Reservation System

[App page](https://appshunter.io/ios/app/vehicle-reservation-system/id6477540369)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D.T.C. Viewer free?

D.T.C. Viewer is free to download, with no in-app purchases.

### Is Vehicle Reservation System free?

Vehicle Reservation System is free to download, with no in-app purchases.

### Do D.T.C. Viewer or Vehicle Reservation System have ads?

Neither D.T.C. Viewer nor Vehicle Reservation System shows ads.

### Which is updated more often, D.T.C. Viewer or Vehicle Reservation System?

D.T.C. Viewer ships an update every 11 months, and Vehicle Reservation System monthly. Most recently, D.T.C. Viewer was updated on October 26, 2026 and Vehicle Reservation System on November 4, 2026.

---

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