# Multi vs Roberts Hot Tub Controller

The clearest difference is update cadence: Roberts Hot Tub Controller at monthly against Multi's every 29 months. Multi's advantage is iOS requirement (11.0 vs 13.0). 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.

Multi ships an update every 29 months, Roberts Hot Tub Controller monthly. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Multi | Roberts Hot Tub Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.3 (4 ratings)](https://appshunter.io/ios/app/roberts-hot-tub-controller/id1615724622/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Monthly** |
| Monetization | — | Free |
| Size | 28 MB | 45 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tempolec](https://appshunter.io/developer/1357618599) | [Robert's Hot Tubs, Inc.](https://appshunter.io/developer/1615724624) |

## What reviewers say

### Multi

[App page](https://appshunter.io/ios/app/multi-smart/id1357618600)

**In-app purchases:** none


### Roberts Hot Tub Controller

[App page](https://appshunter.io/ios/app/roberts-hot-tub-controller/id1615724622)

Control your hot tub remotely from your iOS device. Adjust temperature, set filtration cycles, and manage pumps. Built-in freeze protection ensures your tub is safe.

**Highlights:** Remote hot tub control, Temperature adjustment, Filtration cycle settings, Pump on/off control, Built-in freeze protection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Multi free?

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

### Is Roberts Hot Tub Controller free?

Roberts Hot Tub Controller is free to download, with no in-app purchases.

### Do Multi or Roberts Hot Tub Controller have ads?

Neither Multi nor Roberts Hot Tub Controller shows ads.

### Which is updated more often, Multi or Roberts Hot Tub Controller?

Multi ships an update every 29 months, and Roberts Hot Tub Controller monthly. Most recently, Multi was updated on October 10, 2026 and Roberts Hot Tub Controller on October 8, 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.*