# Comtek 8900A MassageChair vs Di

The clearest difference is update cadence: Di at fortnightly against Comtek 8900A MassageChair's every 6 months. Comtek 8900A MassageChair's advantage is iOS requirement (7.1 vs 12.2). 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.

Comtek 8900A MassageChair ships an update every 6 months, Di fortnightly. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Comtek 8900A MassageChair | Di |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Size | 14 MB | 32 MB |
| Requires iOS | **7.1** | 12.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shandong Kangtai Intelligent Technology Co., Ltd](https://appshunter.io/developer/1286202723) | [蓉 关](https://appshunter.io/developer/1297220895) |

## What reviewers say

### Comtek 8900A MassageChair

[App page](https://appshunter.io/ios/app/comtek-8900a-massagechair/id1130855315)

**Features:** macOS Compatibility

**In-app purchases:** none


### Di

[App page](https://appshunter.io/ios/app/di-link-iot/id6747150306)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Comtek 8900A MassageChair free?

Comtek 8900A MassageChair is free to download, with no in-app purchases.

### Is Di free?

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

### Do Comtek 8900A MassageChair or Di have ads?

Neither Comtek 8900A MassageChair nor Di shows ads.

### Which is updated more often, Comtek 8900A MassageChair or Di?

Comtek 8900A MassageChair ships an update every 6 months, and Di fortnightly. Most recently, Comtek 8900A MassageChair was updated on October 10, 2026 and Di on October 7, 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.*