Plant Therapy RetroFlame Diffuser review

Plant Therapy's RetroFlame is the pick for anyone who wants to carry a diffuser from the desk to the bath to the patio table. It runs on a battery that Plant Therapy rates at about 2.2 hours per full charge and recharges over USB-C, and it also works while plugged in. The 150 ml reservoir and a mist output of about 10 ml per hour cover roughly 215 square feet. The extras set it apart: a flame-inspired light, Bluetooth 5.2 audio so it doubles as a small speaker, and four built-in ambient sounds with names like Dreamscape and Mindful Calm. The price is $54.99, and Plant Therapy ships free in the US on orders of $25 or more. The limits follow from its size: 2.2 hours is not enough for a full night unplugged, the instructions describe continuous mist only, and the coverage suits a personal space. For a fixed bedroom unit, the ASAKUKI Dew Plus costs less and holds twice the water.

Who it is for

people who want a cordless diffuser that moves room to room

Price

$54.99; free US shipping on orders of $25 or more.

RetroFlame Diffuser Regular price $54.99
Quoted from the vendor pricing page on November 13, 2026.

Key features

• Rechargeable with USB-C, about 2.2 hours per full charge
• 150 ml reservoir and about 215 square feet of coverage
• Bluetooth 5.2 audio for a paired phone
• Four built-in ambient sounds
• Flame-inspired light that can be switched off while misting

Strengths and weaknesses

• Strength: The only cordless unit on this list
• Strength: Bluetooth audio and ambient sounds in one device
• Strength: Free US shipping on orders of $25 or more
• Weakness: About 2.2 hours per charge is short for overnight use
• Weakness: Continuous mist only, with no intermittent mode in the instructions
• Weakness: Coverage of about 215 square feet suits a personal space, not an open room

Key facts

• Type: Ultrasonic, rechargeable
• Coverage: Approx. 215 sq ft
• Battery: Approx. 2.2 hours per charge
• Reservoir: 150 ml
• Extras: Bluetooth 5.2, 4 ambient sounds

Where it ranks

Plant Therapy RetroFlame Diffuser is No. 6 in our Best Essential Oil Diffusers verdict.