Herz vs Ohm
Resonance breathing that goes where you go.
Herz and the Ohm Resonance Lamp share an idea: breathe slowly, at the pace your heart answers most, and let live feedback guide you there. Ohm builds it into a lamp for your bedside. Herz puts it on the iPhone and Apple Watch you already carry, so a calmer breath is there before a meeting, on a train, or in bed.
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920 g
Ohm’s lamp, before the stone
It runs from a USB-C cable to the wall, and its stone works only with the lamp. Herz weighs nothing more than the phone in your pocket.
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$350
Ohm Resonance Lamp
The listed price on ohm.health, eligible for HSA and FSA funds. Herz is free to breathe with, and Herz Plus is $39.99 a year.
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US only
Where Ohm ships
Its first release has sold out and the next is “opening soon”. Herz is a download from the App Store.
Size
One stays on the nightstand. One comes with you.
Ohm is a beautiful object, made to live in one room. The lamp is 135 mm across and 181 mm tall, with an 80 g sensing stone you hold through the session, and it needs mains power.
Herz runs on your iPhone, and on Apple Watch it can lead a whole session at your wrist, with the pace set by the Digital Crown. Wherever you happen to need ten slow minutes, it is already there.
Side by side
Row by row.
Each row says which one has the edge, including where it is Ohm. Ohm’s details come from its own site; the sources are listed below.
| Compared on | Herz | Ohm Resonance Lamp |
|---|---|---|
| Price Edge: Herz | Free to breathe with. Herz Plus is $39.99 a year after a 7-day free trial, or $7.99 a month, or $99.99 once. It works with the Apple Watch or chest strap you already own. | $350 for the lamp and stone. HSA and FSA eligible. |
| Where you can use it Edge: Herz | Anywhere: your iPhone, or Apple Watch on its own. At a desk, on a train, in bed, before a hard call. | Where the lamp is plugged in. The stone works only with the lamp, and Ohm says portability is “something we’re exploring”. |
| Getting one Edge: Herz | A download from the App Store, coming soon. Nothing to ship or wait for. | Ships to the US only. Release No. 1 has sold out; Release No. 2 is “opening soon”, with a waitlist. |
| What else you need Edge: Ohm | An iPhone on iOS 17 or later. To see your heart answer, an Apple Watch or a Bluetooth chest strap. Without one, the guided breath still works. | Nothing: the lamp, stone and power cord are in the box. A phone app is optional. |
| Heart sensor Edge: Herz | Your choice: Apple Watch, or any chest strap using the standard Bluetooth heart-rate service, such as the Polar H10, which reports every beat. | An optical (PPG) sensor in the stone, read through your palm. You hold the stone for the whole session. |
| Finding your pace Even | A 17-minute assessment tries six paces, from 7 down to 4.5 breaths a minute, and shows you a scored table of how your heart answered each. The strongest becomes your pace. | The lamp reads your signals and adjusts its breathing cadence in real time to guide you toward resonance. |
| During a session Even | A breathing stone to follow, your heart rate drawn live against the breath, haptics in your hand, and Ocean, River or Wind. Five to twenty minutes. | Light that rises and falls, sound and gentle pulses in the stone. The lamp turns from yellow to blue when you reach resonance. Three minutes by default. |
| Screens Edge: Ohm | Haptics and sound let you breathe with your eyes closed and your phone face down, but a phone or watch runs it. | No screen at all. Light, sound and touch guide you. |
| Progress Edge: Herz | Built in: the days you practised, how your heart followed the pace over weeks, and a resting baseline. Sessions can be saved to Apple Health as mindful minutes. | In the optional companion app, which Ohm’s quick-start guide lists as coming soon. |
| Privacy Edge: Herz | No account. The app makes no network connections of its own; everything stays on your iPhone. | No account needed, and heart data is stored on the lamp. Create an account and session data syncs, encrypted, to Ohm’s cloud. |
| Sharing Edge: Ohm | One person per iPhone. | Several people in a home or office can use the same lamp. |
| In your home Edge: Ohm | An app. Linen by day and Ember by night keep it easy on tired eyes. | A hand-blown glass lamp that is part of the room when you’re not breathing with it. |
Which is for you
Choose the one you’ll use.
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Choose Herz
If calm has to travel
You want a session before a meeting, on a commute or in a hotel room, not only at home. You already have an iPhone, and perhaps an Apple Watch or a chest strap. You want to find your own pace and see it measured, and keep everything on your phone.
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Choose Ohm
If you want no screen at all
You practise in one place, usually beside your bed or chair, and want an object in the room rather than an app. You’d rather nothing else to set up, or want several people in your home to share one device.
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Either way
The breath is the same
Both guide resonance breathing, slow and steady at around five to seven breaths a minute, with feedback from your heart. What helps most is coming back to it day after day.
Sources
Where these details come from
Ohm’s details are taken from Ohm’s own pages, checked on 11 October 2026. Products change; if something here is out of date, tell us and we’ll correct it.
- Ohm Resonance Lamp: price, HSA and FSA eligibility, releases, US-only shipping, specifications, what’s in the box, sharing, portability and the FAQ.
- The Ohm Experience: the light turning from yellow to blue, sound and the stone’s pulses.
- Ohm quick-start guide: three-minute default sessions and the companion app.
- Ohm privacy policy: accounts, data on the lamp and cloud sync.
- Herz’s details describe the app as built; see how it works and the privacy policy.
Ohm and Ohm Resonance Lamp are trademarks of Ohm Health Inc. Herz is independent and not affiliated with, endorsed by or sponsored by Ohm Health Inc.
Give your body ten slow minutes, wherever you are.
Herz – Resonance BreathingiPhone and Apple Watch
Coming soon to the App Store