# OTKAX vs Ballu

The clearest difference is update cadence: OTKAX at every 3 weeks against Ballu's every 13 months. OTKAX also leads on iOS requirement (12.0 vs 14.0). 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.

OTKAX ships an update every 3 weeks, Ballu every 13 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OTKAX | Ballu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/otkax/id1671817443/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 13 months |
| Monetization | Free | — |
| Size | 20 MB | 220 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [水金 陈](https://appshunter.io/developer/1634599571) | [Guangdong BIG Climatic Manufacture Co., LTD](https://appshunter.io/developer/1825356956) |

## What reviewers say

### OTKAX

[App page](https://appshunter.io/ios/app/otkax/id1671817443)

This app connects to your device via Bluetooth to control and test equipment. It also includes a feature to remind users to stay hydrated throughout the day.

**Highlights:** Bluetooth device connection, Equipment control, Equipment testing, Water intake reminders

**Features:** macOS Compatibility

**In-app purchases:** none


### Ballu

[App page](https://appshunter.io/ios/app/ballu/id6748348448)

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

**In-app purchases:** none


## Frequently asked questions

### Is OTKAX free?

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

### Is Ballu free?

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

### Do OTKAX or Ballu have ads?

Neither OTKAX nor Ballu shows ads.

### Which is updated more often, OTKAX or Ballu?

OTKAX ships an update every 3 weeks, and Ballu every 13 months. Most recently, OTKAX was updated on October 8, 2026 and Ballu on October 5, 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.*