# JustIN Mobile vs 300 Main

The clearest difference is rating: 300 Main at 5.0 against JustIN Mobile's 4.6. 300 Main also leads on update cadence (fortnightly vs every 6 weeks). JustIN Mobile's advantage is ratings volume (5.1K vs 27). On price, ads, in-app purchases and monetization model there is nothing between them.

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

300 Main holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: JustIN Mobile has 5.1K ratings behind it against 27, so its average is the more settled of the two.

JustIN Mobile ships an update every 6 weeks, 300 Main fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | JustIN Mobile | 300 Main |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5.1K ratings)](https://appshunter.io/ios/app/justin-mobile/id960998088/reviews) | **[5.0 (27 ratings)](https://appshunter.io/ios/app/300-main/id6545801602/reviews)** |
| Number of ratings | **5.1K** | 27 |
| Positive reviews | 25.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 37 MB | 267 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Salto Systems](https://appshunter.io/developer/893918231) | [Livly Inc](https://appshunter.io/developer/1456628010) |

## What reviewers say

### JustIN Mobile

[App page](https://appshunter.io/ios/app/justin-mobile/id960998088)

This app allows users to manage building access using their smartphone. It provides digital keys for doors, elevators, and car park barriers, eliminating the need for physical keys and simplifying access control across multiple locations.

**Highlights:** Smartphone-based digital keys, Manage access to doors, elevators, barriers, Multi-site and multi-application support, Eliminates lost key issues, User-friendly interface, Store multiple digital keys

**Features:** Apple Wallet

**In-app purchases:** none

**What reviewers like**

- ⭐ Works great
- 🔑 Convenient digital key
- 🔍 Helpful widget feature

**What reviewers complain about**

- 🔌 Unreliable connectivity
- 🔒 Frequent lock-outs
- ⏱️ Slow performance
- 📱 No Apple Watch support

**Reported bugs**

- Keys randomly expire
- Widget not working on latest iOS
- Verification codes not received

**Requested features**

- Add Apple Watch app
- Integrate with Apple Wallet
- Improve guest access sharing


### 300 Main

[App page](https://appshunter.io/ios/app/300-main/id6545801602)

Manage your living experience with a suite of online services. Book amenities, submit service requests, communicate with management, and handle payments seamlessly. Focus on enjoying your life with convenient access to all your building's offerings.

**Highlights:** Amenity reservations, Service requests, Resident messaging, Online payments, Concierge services

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is JustIN Mobile free?

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

### Is 300 Main free?

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

### Which has better reviews, JustIN Mobile or 300 Main?

300 Main is rated higher. JustIN Mobile averages 4.6 out of 5 from 5.1K ratings, while 300 Main averages 5.0 from 27 ratings.

### Do JustIN Mobile or 300 Main have ads?

Neither JustIN Mobile nor 300 Main shows ads.

### Which is updated more often, JustIN Mobile or 300 Main?

JustIN Mobile ships an update every 6 weeks, and 300 Main fortnightly. Most recently, JustIN Mobile was updated on October 26, 2026 and 300 Main 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.*