HygieneKey vs SMART_AROMA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HygieneKey
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.
- 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
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Hygienekey is a free application which is easy to control all smart devices that integrated with Hygienekey chip. Just several easy touches on the screen of your mobile, the machine can be programmed very quickly, information like working schedule, refill life, refill spec and peak hour, etc. You can also save your settings as a profile and import it for other devices. • Profile setting • Battery status indication • Refill life setting and status indication • Working schedule setting • Normal/Peak time option • Quick button to turn dispenser OFF • Password support • To have a Test application on APP • To Reset the device on APP • Device service span setting • LED ON/OFF setting • Language option: English and Spanish More information on www.hygienekey.com
SMART_AROMA
Manage your smart fragrance device remotely using your smartphone. Adjust fan speed, set fragrance intensity, and customize device settings without needing an internet connection.
- Device search and add
- Rename and remark devices
- Adjust fan wind/power
- Set fragrance density
- Password protection
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Shangxiang Smart APP, professional smart fragrance management application. Control your fragrance machine through a smartphone without internet connection. 1. Device search and add 2. Device name, remark settings 3. Fan wind/power level adjustment 4. 5 intervals and fragrance density settings 5. Access password setting
Screenshots
Verdict
The clearest difference is review sentiment: SMART_AROMA at 100% against HygieneKey's 50%. SMART_AROMA also leads on update cadence (every 8 days vs every 2 months). HygieneKey's advantage is iOS requirement (8.0 vs 11.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HygieneKey ships an update every 2 months, SMART_AROMA every 8 days. The most recent releases landed on September 23, 2026 and October 17, 2026 respectively.
| Parameter | HygieneKey | SMART_AROMA |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 59 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | 春华 赖 | 萍萍 刘 |
Customer experience
HygieneKey
SMART_AROMA
In-app purchases
HygieneKey
No in-app purchases
SMART_AROMA
No in-app purchases
