# Race Trajectory vs 发令助手pro

The clearest difference is in-app purchases: 发令助手pro at none against Race Trajectory's 1. 发令助手pro also leads on ads (none vs shown). Race Trajectory's advantage is iOS requirement (17.0 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Race Trajectory sells 1 in-app purchase, starting at $1.99 per month. 发令助手pro asks for nothing beyond the download.

## The numbers

| Metric | Race Trajectory | 发令助手pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | — |
| Size | 20 MB | 5 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Matsuoka](https://appshunter.io/developer/1697141668) | [小赫 莫](https://appshunter.io/developer/1887912193) |

## What reviewers say

### Race Trajectory

[App page](https://appshunter.io/ios/app/race-trajectory/id6747305681)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $1.99 | per month |


### 发令助手pro

[App page](https://appshunter.io/ios/app/pro/id6761249702)

**In-app purchases:** none


## Frequently asked questions

### Is Race Trajectory free?

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

### Is 发令助手pro free?

发令助手pro is free to download, with no in-app purchases.

### Do Race Trajectory or 发令助手pro have ads?

Race Trajectory shows ads; 发令助手pro does not.

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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.*