# Ducaheat vs Celerlight

Ducaheat and Celerlight are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Ducaheat ships an update every 8 months, Celerlight every 14 months. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Ducaheat | Celerlight |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 14 months |
| Monetization | Free | — |
| Size | 19 MB | 197 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [CASPLE](https://appshunter.io/developer/744012888) | [BRASS & FITTINGS, SL](https://appshunter.io/developer/1707753167) |

## What reviewers say

### Ducaheat

[App page](https://appshunter.io/ios/app/ducaheat/id1535169960)

Control your heating system remotely via the internet. Manage radiators and energy meters across multiple properties from a single account. Schedule heating, monitor energy consumption, and utilize geofencing for energy savings.

**Highlights:** Remote heating system control, Multi-property management, Weekly heating scheduling, Real-time energy consumption monitoring, Geofencing for energy savings, Weather forecast integration, User invitation for shared control

**Features:** macOS Compatibility

**In-app purchases:** none


### Celerlight

[App page](https://appshunter.io/ios/app/celerlight/id6466745415)

**In-app purchases:** none


## Frequently asked questions

### Is Ducaheat free?

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

### Is Celerlight free?

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

### Do Ducaheat or Celerlight have ads?

Neither Ducaheat nor Celerlight shows ads.

### Which is updated more often, Ducaheat or Celerlight?

Ducaheat ships an update every 8 months, and Celerlight every 14 months. Most recently, Ducaheat was updated on October 7, 2026 and Celerlight on October 19, 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.*