Oral-B iO Series 9 vs Revlon One-Step Hair Dryer & Volumizer

The Oral-B iO Series 9 pairs a magnetic, micro-vibrating brush head with linear magnetic drive technology for a smoother, gentler brushing motion compared to traditional oscillating-rotating brushes, while still delivering thorough plaque removal. A color-coded smart pressure sensor lights up green, yellow, or red on the handle to indicate ideal, acceptable, or excessive brushing pressure, helping prevent gum damage from brushing too hard. The companion app uses the phone camera during brushing to provide an AI-powered 3D mouth map showing which areas were missed or need more attention, turning brushing into a more guided, data-driven routine.

The Revlon One-Step Hair Dryer & Volumizer combines a powerful dryer with a styling brush to give you salon‑like results at home. Its unique oval brush design lifts hair at the roots while the airflow dries, creating volume and shine without the need for multiple tools. Ideal for busy mornings or quick touch‑ups, the lightweight unit delivers consistent heat and airflow, reducing frizz and protecting strands. The ergonomic handle and detachable brush make it easy to clean and store, while the multiple heat and speed settings let you customize the experience for any hair type.

• Genuinely useful real-time pressure feedback
• Smooth, comfortable brushing motion
• Detailed AI-guided app coaching
• Premium build quality

• Fast drying with built-in styling brush
• Adjustable heat and speed settings
• Creates volume and shine simultaneously
• Easy to clean detachable brush

• High price versus standard electric toothbrushes
• Replacement brush heads add ongoing cost
• App features require a smartphone

• No smart or app connectivity
• Brush can be noisy on high speed
• Limited to one brush size for all hair types