Vertices AQS vs Sereni

Cloud-based multi-sensor air quality monitoring solution. Real-time measurement values with mobile app detects the slightest nuances in the quality and safety of ambient air using the world's best sensors and circuits for management of indoor air quality. This is a standalone product. Not for medical use.

Sereni is the simplest way to play calming background sound for sleep, focus, and relaxation. Pick a theme and press play. Ambient gives you five soothing noise colors: White, Pink, Brown, Green, and Deep. Life Sounds brings real recordings of Rain, a Fan, and the Ocean. Lo-Fi adds three original, mellow instrumental beats made for long study sessions. Every sound is set against its own peaceful painted background. Set a sleep timer to drift off and let Sereni stop on its own, with playback that keeps going in the background and full lock-screen controls. Sereni's clean, modern design stays out of your way so you can focus on rest. No clutter, no sign-up — just press play. Features: • Three themes: Ambient, Life Sounds, and Lo-Fi, with a simple switcher at the top of the player • Ambient: White, Pink, Brown, Green, and Deep noise • Life Sounds: Rain, Fan, and Ocean — free for everyone • Lo-Fi (Sereni+): Attic, Corner Booth, and Snowfall — original instrumental beats, no vocals • Next stays inside the theme you chose • Sleep timer with 15, 30, and 60 minute presets or your own duration • Choose a default sound to open to, or pick up where you left off • Background playback with lock screen & Control Center controls • Beautiful, calming backgrounds for every sound • Light, Dark, and System appearance • Designed for accessibility (VoiceOver & Dynamic Type) • Sereni+ home-screen widget: play, pause, and switch sounds without opening the app Want more? Sereni+ is a simple one-time purchase that removes all ads, unlocks the Lo-Fi theme, and adds the home-screen widget — a mini player with live artwork for whatever's playing. Download Sereni and discover the soothing power of sound.