# JustEnter vs lüft

The clearest difference is review sentiment: JustEnter at 100% against lüft's 0%. JustEnter also leads on update cadence (fortnightly vs every 2 months). lüft's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

JustEnter ships an update fortnightly, lüft every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | JustEnter | lüft |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (13 ratings)](https://appshunter.io/ios/app/luft-sunradon/id1512257787/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 54 MB | 41 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masabi US Ltd](https://appshunter.io/developer/689182695) | [SunRADON LLC](https://appshunter.io/developer/1512257786) |

## What reviewers say

### JustEnter

[App page](https://appshunter.io/ios/app/justenter/id1104794083)

Access offices using your mobile device. This system utilizes barcode technology for secure entry to authorized locations. It's a convenient way to manage building access.

**Highlights:** Barcode technology for access, Office door entry, Mobile ticketing integration, Secure building access

**Features:** Apple Wallet

**In-app purchases:** none


### lüft

[App page](https://appshunter.io/ios/app/luft-sunradon/id1512257787)

Monitor your indoor air quality from anywhere with real-time sensor readings and visual alerts. Track trends, receive custom notifications, and analyze mold and outdoor air risks. Integrates with other devices and allows data sharing with professionals.

**Highlights:** Real-time IAQ sensor readings, Traffic light color-coded alerts, Indoor Mold Risk Indicator, Outdoor Air Quality Risk Indicator, Trend charts for short/long-term fluctuations, Custom alerts and notifications, Nightlight function programming

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JustEnter free?

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

### Is lüft free?

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

### Do JustEnter or lüft have ads?

JustEnter shows ads; lüft does not.

### Which is updated more often, JustEnter or lüft?

JustEnter ships an update fortnightly, and lüft every 2 months. Most recently, JustEnter was updated on October 24, 2026 and lüft on October 24, 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.*