# Density Converter vs FriedrichLink

The clearest difference is price: FriedrichLink at Free against Density Converter's $1.99. FriedrichLink also leads on update cadence (every 5 weeks vs every 38 months). Density Converter's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 17.0). On ads and in-app purchases there is nothing between them.

FriedrichLink is free to download; Density Converter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Density Converter ships an update every 38 months, FriedrichLink every 5 weeks. The most recent releases landed on October 4, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Density Converter | FriedrichLink |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.6 (19 ratings)](https://appshunter.io/ios/app/friedrichlink/id6476686284/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 6.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 0 MB | 33 MB |
| Requires iOS | **13.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anna Filobok](https://appshunter.io/developer/1613515832) | [Rheem Manufacturing Company](https://appshunter.io/developer/853793269) |

## What reviewers say

### Density Converter

[App page](https://appshunter.io/ios/app/density-converter/id1539270045)

**Features:** macOS Compatibility

**In-app purchases:** none


### FriedrichLink

[App page](https://appshunter.io/ios/app/friedrichlink/id6476686284)

Control your Friedrich Kuhl and WallMaster air conditioners remotely via your smartphone. Enjoy personalized comfort and energy savings with intelligent scheduling and voice command options.

**Highlights:** Remote smartphone programming, Voice command control, Intelligent scheduling, Personalized comfort, Energy savings

**In-app purchases:** none

**What reviewers like**

- 👍 Nice Interface
- 👍 Group feature is awesome
- 👍 It works!

**What reviewers complain about**

- 🐛 App barely works
- 🐛 Slow response times
- 🐛 Frequent crashes
- 🐛 App gets stuck loading
- 🐛 Inaccurate temperature readings

**Reported bugs**

- Power button requires double press
- App reports inaccurate information due to sleep mode
- App crashes
- App takes a long time to turn off AC
- Forget changing thermostat

**Requested features**

- Integrate Matter or HomeKit
- Add option to schedule turning off unit
- Improve app functionality and features
- Fix character restrictions in text fields
- Add option for unit to turn off after X hours


## Frequently asked questions

### Is Density Converter free?

Density Converter costs $1.99, with no in-app purchases.

### Is FriedrichLink free?

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

### Do Density Converter or FriedrichLink have ads?

Neither Density Converter nor FriedrichLink shows ads.

### Which is updated more often, Density Converter or FriedrichLink?

Density Converter ships an update every 38 months, and FriedrichLink every 5 weeks. Most recently, Density Converter was updated on October 4, 2026 and FriedrichLink on October 21, 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.*