# Scent Master Pro vs EV Check In

The clearest difference is update cadence: EV Check In at every 2 days against Scent Master Pro's fortnightly. Scent Master Pro's advantage is iOS requirement (13.0 vs 15.1). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Scent Master Pro against 5.0 for EV Check In. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Scent Master Pro ships an update fortnightly, EV Check In every 2 days. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Scent Master Pro | EV Check In |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/scent-master-pro/id6499073832/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/ev-check-in/id6762039403/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | Free |
| Size | 180 MB | 32 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [兵 姚](https://appshunter.io/developer/1546606210) | [CrewSwap app LLC](https://appshunter.io/developer/1787729654) |

## What reviewers say

### Scent Master Pro

[App page](https://appshunter.io/ios/app/scent-master-pro/id6499073832)

This intelligent fragrance management app allows real-time monitoring and remote control of connected devices. Users can customize working modes, set schedules, and track oil levels for a seamless experience.

**Highlights:** Remote device control, Custom working modes, Real-time oil level monitoring, Intelligent usage calibration, Device sharing management, Scheduled operation

**Features:** macOS Compatibility

**In-app purchases:** none


### EV Check In

[App page](https://appshunter.io/ios/app/ev-check-in/id6762039403)

This free app provides real-time information on EV charger availability, powered by user check-ins. Avoid wasted trips by seeing if a charger is in use before you arrive. Users can contribute by scanning QR codes and updating charger status.

**Highlights:** Real-time charger status, Community-powered updates, QR code scanner, User check-ins, Contribute to community data

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

**In-app purchases:** none


## Frequently asked questions

### Is Scent Master Pro free?

Scent Master Pro is free to download, with no in-app purchases.

### Is EV Check In free?

EV Check In is free to download, with no in-app purchases.

### Which has better reviews, Scent Master Pro or EV Check In?

Scent Master Pro and EV Check In are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Scent Master Pro or EV Check In have ads?

Neither Scent Master Pro nor EV Check In shows ads.

### Which is updated more often, Scent Master Pro or EV Check In?

Scent Master Pro ships an update fortnightly, and EV Check In every 2 days. Most recently, Scent Master Pro was updated on October 3, 2026 and EV Check In on October 12, 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.*