Sereniby vs U
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sereniby
Control your smart air purifier remotely, monitor your baby's room environment in real-time, and receive maintenance alerts. Optimize air quality and comfort with customizable schedules and automatic adjustments for a safe and healthy space.
- Remote smart purifier control
- Real-time air quality monitoring
- Customizable schedules
- Automatic purification adjustments
- Maintenance reminders and filter ordering
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Welcome to Sereniby, the essential companion app for your Sereniby smart purifier. Designed by parents for parents, our app enhances your device's capabilities, with features that include: **Smart Controls: Use the app to control fan speed, purification power, and lighting settings. Customize schedules to fit your baby's sleep routine, ensuring optimal air quality and comfort at all times. **Real-Time Environmental Monitoring & Alerts: Track air quality and temperature in your baby's room with real-time updates and alerts, giving you peace of mind that your baby is always in a safe environment. **Auto Purify Mode: Automatically adjust the fan and purifier settings based on air quality readings, ensuring continuous protection without manual intervention. **Maintenance Reminders: Get notified when it's time to replace the HEPA filter, ensuring your device operates at peak performance. Order replacements directly through the app. Download the Sereniby app now and unlock the full potential of your Sereniby today.
U
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U-Flow: Stay Connected and in Control With the U-Flow app, effortlessly manage your home EV charging right from your fingertips! Enjoy a smart, efficient, and modern charging experience that fits seamlessly into your lifestyle. Power up your EV with ease.
Screenshots
Verdict
The clearest difference is ads: Sereniby at none against U's shown. Sereniby also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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.
Sereniby ships an update every 3 weeks, U every 2 months. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.
| Parameter | Sereniby | U |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 116 MB | 66 MB |
| Age rating | 4+ | 17+ |
| Developer | Sereniby, Inc. | Fuzhou Ulandpower Technology Co., Ltd. |
In-app purchases
Sereniby
No in-app purchases
U
No in-app purchases
