# Concept Heating vs Bubble Level

The clearest difference is in-app purchases: Concept Heating at none against Bubble Level's 5. Concept Heating also leads on iOS requirement (8.0 vs 17.6). Bubble Level's advantage is update cadence (every 2 weeks vs every 23 months) and ratings volume (10 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Bubble Level sells 5 in-app purchases, starting at $3.99 per month. Concept Heating asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Concept Heating against 4.9 for Bubble Level. That said, the two scores are not equally well evidenced: Bubble Level has 10 ratings behind it against 1, so its average is the more settled of the two.

Concept Heating ships an update every 23 months, Bubble Level every 2 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Concept Heating | Bubble Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/concept-heating/id1412643887/reviews)** | [4.9 (10 ratings)](https://appshunter.io/ios/app/bubble-level-angle-and-ruler/id6746100987/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 17 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jindrich Valenta - Concept](https://appshunter.io/developer/1409588876) | [Ungo Inc.](https://appshunter.io/developer/1813952838) |

## What reviewers say

### Concept Heating

[App page](https://appshunter.io/ios/app/concept-heating/id1412643887)

Remotely manage your CONCEPT convection heater from your smartphone or tablet via Wi-Fi. Turn your heater on or off and set your desired temperature from anywhere, ensuring your home is warm when you arrive.

**Highlights:** Remote heater control via Wi-Fi, Turn heater on/off, Set desired temperature, Control from smartphone or tablet, Compatible with VT5000 and VT5010 models

**Features:** macOS Compatibility

**In-app purchases:** none


### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-angle-and-ruler/id6746100987)

This app provides precise digital measurements for leveling and angle detection, acting as a spirit level, ruler, and laser tool. It helps with various tasks like furniture assembly, hanging decor, and construction projects, offering real-time feedback and the ability to save and share measurements.

**Highlights:** Precise spirit level with 0.1 degree accuracy, Integrated laser measurement tool, Digital ruler for length measurement, Save, note, and export measurements, Customizable themes and settings, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Level Premium | $3.99 | per month |
| Weekly Premium | $3.99 | per 7 days |
| Bubble Level Weekly | $4.99 | per 7 days |
| Remove All Ads | $19.99 | per year |
| Bubble Level Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Concept Heating free?

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

### Is Bubble Level free?

Bubble Level is free to download, with in-app purchases available.

### Which has better reviews, Concept Heating or Bubble Level?

Concept Heating is rated higher. Concept Heating averages 5.0 out of 5 from 1 ratings, while Bubble Level averages 4.9 from 10 ratings.

### Do Concept Heating or Bubble Level have ads?

Neither Concept Heating nor Bubble Level shows ads.

### Which is updated more often, Concept Heating or Bubble Level?

Concept Heating ships an update every 23 months, and Bubble Level every 2 weeks. Most recently, Concept Heating was updated on October 3, 2026 and Bubble Level on October 5, 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.*