# Opro9 SmartDiaper vs QOCA STETH

The clearest difference is update cadence: Opro9 SmartDiaper at monthly against QOCA STETH's every 5 months. 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.

Opro9 SmartDiaper ships an update monthly, QOCA STETH every 5 months. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Opro9 SmartDiaper | QOCA STETH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/opro9-smartdiaper/id1108754105/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | — |
| Size | 30 MB | 9 MB |
| Requires iOS | **12.4** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [CviLux Corporation](https://appshunter.io/developer/895729968) | [Quanta](https://appshunter.io/developer/506596827) |

## What reviewers say

### Opro9 SmartDiaper

[App page](https://appshunter.io/ios/app/opro9-smartdiaper/id1108754105)

This app connects to a wearable sensor to detect when a baby wets their diaper. It sends timely notifications to parents, providing information on temperature and humidity levels, and tracks diaper changes. It acts as a high-tech assistant for caretakers.

**Highlights:** Bluetooth sensor connection, Diaper wetness detection, Timely parent notifications, Child temperature and humidity monitoring, Diaper change statistics, Connect to multiple sensors

**In-app purchases:** none


### QOCA STETH

[App page](https://appshunter.io/ios/app/qoca-steth/id1639849685)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Opro9 SmartDiaper free?

Opro9 SmartDiaper is free to download, with no in-app purchases.

### Is QOCA STETH free?

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

### Do Opro9 SmartDiaper or QOCA STETH have ads?

Neither Opro9 SmartDiaper nor QOCA STETH shows ads.

### Which is updated more often, Opro9 SmartDiaper or QOCA STETH?

Opro9 SmartDiaper ships an update monthly, and QOCA STETH every 5 months. Most recently, Opro9 SmartDiaper was updated on October 22, 2026 and QOCA STETH on October 20, 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.*