# JustIN Mobile vs SmartFlyer CORE

The clearest difference is update cadence: JustIN Mobile at every 6 weeks against SmartFlyer CORE's every 12 months. SmartFlyer CORE's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

JustIN Mobile ships an update every 6 weeks, SmartFlyer CORE every 12 months. The most recent releases landed on October 18, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | JustIN Mobile | SmartFlyer CORE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/justin-mobile/id960998088/reviews)** | — |
| Number of ratings | **4.3K** | — |
| Positive reviews | 25.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 12 months |
| Monetization | Free | — |
| Size | 37 MB | 15 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Salto Systems](https://appshunter.io/developer/893918231) | [THE SMART FLYER INC](https://appshunter.io/developer/1314979853) |

## 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


### SmartFlyer CORE

[App page](https://appshunter.io/ios/app/smartflyer-core/id6474574238)

**In-app purchases:** none


## Frequently asked questions

### Is JustIN Mobile free?

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

### Is SmartFlyer CORE free?

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

### Do JustIN Mobile or SmartFlyer CORE have ads?

Neither JustIN Mobile nor SmartFlyer CORE shows ads.

### Which is updated more often, JustIN Mobile or SmartFlyer CORE?

JustIN Mobile ships an update every 6 weeks, and SmartFlyer CORE every 12 months. Most recently, JustIN Mobile was updated on October 18, 2026 and SmartFlyer CORE on September 28, 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.*