# DFirstCoder vs Jetlines

The clearest difference is in-app purchases: Jetlines at none against DFirstCoder's 8. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DFirstCoder sells 8 in-app purchases, starting at $108.99 per year. Jetlines asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 6, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DFirstCoder | Jetlines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/dfirstcoder/id1637894055/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 94 MB | 40 MB |
| Requires iOS | **13.0** | 14.0.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen QiXin Technology Co., Ltd.](https://appshunter.io/developer/1637894777) | [帆 孟](https://appshunter.io/developer/1562320051) |

## What reviewers say

### DFirstCoder

[App page](https://appshunter.io/ios/app/dfirstcoder/id1637894055)

This app provides comprehensive vehicle diagnostics and customization for car owners. It offers one-click app features for easy operation, Bluetooth connectivity, and the ability to read/clear trouble codes, perform smog checks, and view live data. It supports a wide range of vehicle models.

**Highlights:** One-click apps for easy operation, Comprehensive diagnostic features, Bluetooth wireless connectivity, Read and clear trouble codes, Smog check functionality, Live data display, Supports VAG, BMW, Mercedes-Benz models

**Features:** Family Sharing

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan Subscription | $108.99 | per year |
| Pro Plan Subscription (Family) | $158.99 | per year |
| 350 QD | $4.99 | one-time |
| 700 QD | $9.95 | one-time |
| 1400 QD | $19.49 | one-time |
| 3500 QD | $49.99 | one-time |
| 7000 QD | $96.99 | one-time |
| 10500 QD | $145.99 | one-time |


### Jetlines

[App page](https://appshunter.io/ios/app/jetlines/id6746468531)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DFirstCoder free?

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

### Is Jetlines free?

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

### Do DFirstCoder or Jetlines have ads?

Neither DFirstCoder nor Jetlines shows ads.

### Which is updated more often, DFirstCoder or Jetlines?

DFirstCoder ships an update every 3 weeks, and Jetlines every 3 weeks. Most recently, DFirstCoder was updated on September 6, 2026 and Jetlines on September 18, 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.*