# iService/ IoT Sensing vs WriterAI

The clearest difference is in-app purchases: iService/ IoT Sensing at none against WriterAI's 1. iService/ IoT Sensing also leads on update cadence (every 5 weeks vs every 15 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WriterAI sells 1 in-app purchase, starting at $1.99 per 7 days. iService/ IoT Sensing asks for nothing beyond the download.

iService/ IoT Sensing ships an update every 5 weeks, WriterAI every 15 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | iService/ IoT Sensing | WriterAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 15 months |
| Size | 29 MB | 51 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Advantech](https://appshunter.io/developer/413213069) | [Berke Kurnaz](https://appshunter.io/developer/1663447140) |

## What reviewers say

### iService/ IoT Sensing

[App page](https://appshunter.io/ios/app/iservice-iot-sensing/id1663392306)

**Features:** macOS Compatibility

**In-app purchases:** none


### WriterAI

[App page](https://appshunter.io/ios/app/writerai-content-writer/id6447802018)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WriterAI Premium | $1.99 | per 7 days |


## Frequently asked questions

### Is iService/ IoT Sensing free?

iService/ IoT Sensing is free to download, with no in-app purchases.

### Is WriterAI free?

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

### Do iService/ IoT Sensing or WriterAI have ads?

Neither iService/ IoT Sensing nor WriterAI shows ads.

### Which is updated more often, iService/ IoT Sensing or WriterAI?

iService/ IoT Sensing ships an update every 5 weeks, and WriterAI every 15 months. Most recently, iService/ IoT Sensing was updated on October 30, 2026 and WriterAI 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.*