# HotKup vs OTKAX

The clearest difference is review sentiment: OTKAX at 50% against HotKup's 0%. OTKAX also leads on rating (2.0 vs 1.5) and update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OTKAX holds the better App Store score, 2.0 against 1.5. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 0% of HotKup's written reviews are positive against 50% of OTKAX's.

HotKup ships an update every 2 months, OTKAX every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | HotKup | OTKAX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (4 ratings)](https://appshunter.io/ios/app/hotkup-temperature-control-mug/id1624277809/reviews) | **[2.0 (4 ratings)](https://appshunter.io/ios/app/otkax/id1671817443/reviews)** |
| Number of ratings | 4 | 4 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 20 MB |
| Requires iOS | 12.4 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sinospec](https://appshunter.io/developer/1385398412) | [水金 陈](https://appshunter.io/developer/1634599571) |

## What reviewers say

### HotKup

[App page](https://appshunter.io/ios/app/hotkup-temperature-control-mug/id1624277809)

This app allows you to control the temperature of your mug, boil water, brew beverages, and maintain your ideal drinking temperature. It offers both app and manual control, with versatile power options including battery, AC, and 12v car power.

**Highlights:** Boil water, Brew coffee/tea, Maintain perfect temperature, App and manual control, Battery, AC, and 12v power options

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HotKup free?

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

### Is OTKAX free?

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

### Which has better reviews, HotKup or OTKAX?

OTKAX is rated higher. HotKup averages 1.5 out of 5 from 4 ratings, while OTKAX averages 2.0 from 4 ratings.

### Do HotKup or OTKAX have ads?

Neither HotKup nor OTKAX shows ads.

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

HotKup ships an update every 2 months, and OTKAX every 3 weeks. Most recently, HotKup was updated on October 24, 2026 and OTKAX on October 24, 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.*