# IMSC91 vs 星卡TD

The clearest difference is iOS requirement: 星卡TD at 9.0 against IMSC91's 12.0. 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.

IMSC91 ships an update every 2 months, 星卡TD every 5 weeks. The most recent releases landed on August 28, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | IMSC91 | 星卡TD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 148 MB | 260 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [北京金奔腾汽车科技有限公司](https://appshunter.io/developer/939116243) | [THINKCAR INC](https://appshunter.io/developer/1464847379) |

## What reviewers say

### IMSC91

[App page](https://appshunter.io/ios/app/imsc91/id1250310840)

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

**In-app purchases:** none


### 星卡TD

[App page](https://appshunter.io/ios/app/td/id1514554756)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IMSC91 free?

IMSC91 is free to download, with no in-app purchases.

### Is 星卡TD free?

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

### Do IMSC91 or 星卡TD have ads?

Neither IMSC91 nor 星卡TD shows ads.

### Which is updated more often, IMSC91 or 星卡TD?

IMSC91 ships an update every 2 months, and 星卡TD every 5 weeks. Most recently, IMSC91 was updated on August 28, 2026 and 星卡TD on September 10, 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.*