# HygieneKey vs Scheme Locker

The clearest difference is iOS requirement: HygieneKey at 8.0 against Scheme Locker's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 8, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | HygieneKey | Scheme Locker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scheme-locker/id6448636720/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 59 MB | 28 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [春华 赖](https://appshunter.io/developer/1604536904) | [Scheme DOO](https://appshunter.io/developer/1685223703) |

## What reviewers say

### HygieneKey

[App page](https://appshunter.io/ios/app/hygienekey/id1178896230)

Control smart devices integrated with a special chip through your mobile. Easily program machines, manage schedules, monitor battery, and set refill life. Save and import device settings as profiles for quick setup.

**Highlights:** Profile setting and import, Battery status indication, Refill life setting and status, Working schedule setting, Normal/Peak time options, Device reset and service span setting, Password support

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

**In-app purchases:** none


### Scheme Locker

[App page](https://appshunter.io/ios/app/scheme-locker/id6448636720)

This utility app allows users to open lockers at various locations. It is currently functional for lockers created by the development team, such as those found in science and technology parks containing educational materials.

**Highlights:** Open lockers at designated locations, Access lockers in science and technology parks, Retrieve educational materials from lockers, Utilize package locker functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is HygieneKey free?

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

### Is Scheme Locker free?

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

### Do HygieneKey or Scheme Locker have ads?

Neither HygieneKey nor Scheme Locker shows ads.

### Which is updated more often, HygieneKey or Scheme Locker?

HygieneKey ships an update every 2 months, and Scheme Locker every 2 months. Most recently, HygieneKey was updated on September 8, 2026 and Scheme Locker on June 2, 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.*