# Comtek 8900A MassageChair vs WattaCar

The clearest difference is in-app purchases: Comtek 8900A MassageChair at none against WattaCar's 2. Comtek 8900A MassageChair also leads on device support (3 vs 1) and iOS requirement (7.1 vs 18.4). On price, update cadence and ads there is nothing between them.

Both are free to download. WattaCar sells 2 in-app purchases, starting at $1.99 per month. Comtek 8900A MassageChair asks for nothing beyond the download.

Comtek 8900A MassageChair ships an update every 6 months, WattaCar every 3 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Comtek 8900A MassageChair | WattaCar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Size | 14 MB | 8 MB |
| Requires iOS | **7.1** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shandong Kangtai Intelligent Technology Co., Ltd](https://appshunter.io/developer/1286202723) | [Laurent Peignault](https://appshunter.io/developer/1411627672) |

## What reviewers say

### Comtek 8900A MassageChair

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

**Features:** macOS Compatibility

**In-app purchases:** none


### WattaCar

[App page](https://appshunter.io/ios/app/wattacar-charging-assistant/id6745976883)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $1.99 | per month |
| Annual Pro | $11.99 | per year |


## Frequently asked questions

### Is Comtek 8900A MassageChair free?

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

### Is WattaCar free?

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

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

Neither Comtek 8900A MassageChair nor WattaCar shows ads.

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

Comtek 8900A MassageChair ships an update every 6 months, and WattaCar every 3 months. Most recently, Comtek 8900A MassageChair was updated on October 26, 2026 and WattaCar on October 25, 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.*