# PoolTherm vs Merlino

The clearest difference is update cadence: Merlino at every 7 months against PoolTherm's every 24 months. PoolTherm's advantage is iOS requirement (11.0 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.

PoolTherm ships an update every 24 months, Merlino every 7 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PoolTherm | Merlino |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 241 MB | 5 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dantherm](https://appshunter.io/developer/1368468352) | [C.P.A s.r.l](https://appshunter.io/developer/1701910642) |

## What reviewers say

### PoolTherm

[App page](https://appshunter.io/ios/app/pooltherm/id1511669038)

Remotely manage your pool's heating system from your mobile device. Control power, modes, temperature, and set timers. Includes weather forecasts to optimize heating schedules.

**Highlights:** Remote heat pump control, On/Off functionality, Whisper/Boost mode selection, Water temperature setting, Timer scheduling, Weather forecast integration

**In-app purchases:** none


### Merlino

[App page](https://appshunter.io/ios/app/merlino/id6459659864)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PoolTherm free?

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

### Is Merlino free?

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

### Do PoolTherm or Merlino have ads?

Neither PoolTherm nor Merlino shows ads.

### Which is updated more often, PoolTherm or Merlino?

PoolTherm ships an update every 24 months, and Merlino every 7 months. Most recently, PoolTherm was updated on October 9, 2026 and Merlino on October 11, 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.*