# PoolTherm vs CELSI

The clearest difference is iOS requirement: PoolTherm at 11.0 against CELSI's 13.0. On price, update cadence, 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.

PoolTherm ships an update every 24 months, CELSI every 17 months. The most recent releases landed on June 11, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | PoolTherm | CELSI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 17 months** |
| Monetization | Free | — |
| Size | 241 MB | 189 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Dantherm](https://appshunter.io/developer/1368468352) | [BFM Europe Limited](https://appshunter.io/developer/1615740286) |

## 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


### CELSI

[App page](https://appshunter.io/ios/app/celsi/id1615740284)

**In-app purchases:** none


## Frequently asked questions

### Is PoolTherm free?

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

### Is CELSI free?

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

### Do PoolTherm or CELSI have ads?

Neither PoolTherm nor CELSI shows ads.

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

PoolTherm ships an update every 24 months, and CELSI every 17 months. Most recently, PoolTherm was updated on June 11, 2026 and CELSI on September 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.*