HMD OffGrid Review: Satellite SOS Without a Garmin

Updated July 2026

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• Video
• Features
• Messaging
• Reliability
• SOS
• Tracking
• Battery
• Plans

Not a Garmin inReach replacement, but a smart lightweight backup if you mostly hike in North America.

I’ve been using the HMD OffGrid since it came out. No global coverage, no navigation, no weather, and it needs your phone for most functionality. Coverage is in select areas of North America, Canada, Europe, and Australia/New Zealand; if you need true worldwide coverage, this is not it. But as a supplement to a satellite-enabled phone, it’s a solid buy. Messaging is fast, battery is good for its size, and SOS coverage is bundled into every plan. At $6.66/month on the Freedom plan, that’s hard to beat. If you mostly hike in the lower 48 and want a backup you can clip to your pack and forget about until you need it, the HMD OffGrid makes sense. For a full comparison with Garmin and other options, see my best satellite communicator picks.

Video

Features

• No screen. It’s designed to be used with your smartphone (iOS or Android). If your phone dies, your options are limited to the physical SOS button. It does work when your phone is in airplane mode.
• Messaging, SOS, and location breadcrumb sharing are the core features.
• Uses GEO satellites via Skylo instead of Iridium LEO. In practice: faster messaging, slightly more directional sensitivity.
• SOS coverage is included in every plan. If you’re billed for a rescue, Overwatch & Rescue covers it directly.
• Battery life is acceptable for a 60g device: good for long day hikes and weekend trips.
• IP68-rated. No durability issues over many miles in rain and rough conditions.

Messaging

Pair the device with the HMD OffGrid app via Bluetooth to access full messaging. The app is free and works without a device, so friends and family can receive messages without owning one. A few things to know:

• Available on Android and iOS.
• Your phone number is your user ID.
• The app automatically sends via WiFi or cellular when available, saving satellite usage. You can force satellite-only if needed, and it defaults to satellite in airplane mode.
• If the recipient doesn’t have the HMD OffGrid app, they get an SMS asking them to download it (free) to reply.
• The app shows message status: sent, sent via satellite, and read confirmations.
• Currently text-only. HMD has demoed voice notes over satellite, but as of now that feature isn’t available, and I wouldn’t buy this assuming it will ship.

Reliability

The HMD OffGrid uses geostationary satellites (GEO) through the Skylo network, fixed at around 22,000 miles above the equator. That’s different from Garmin inReach, which uses Iridium’s low-earth orbit (LEO) network where dozens of satellites pass overhead each hour.

GEO has tradeoffs. Messages often go out faster since you’re connecting to the same stationary satellite repeatedly. But the farther north you go, Alaska, northern Canada, Scandinavia, the lower the satellite angle, which makes connections harder. In my experience it’s connected the majority of the time, though it’s more directionally sensitive than other communicators. One of the GEO providers used is ViaSat, the same network behind in-flight internet on commercial airlines.

SOS

SOS is fully bundled into every HMD OffGrid plan, which is one of its strongest selling points. Unlike Garmin, where you either accept the risk or add separate insurance, HMD bundles Overwatch & Rescue emergency assistance into every plan, which in many common scenarios can cover coordination and certain rescue costs.

How it works:

• Trigger SOS from the physical button on the device or from the app.
• The alert goes to Overwatch & Rescue, a 24/7 response center staffed by former military, law enforcement, paramedics, and first responders.
• They build a full response case file, contact your emergency contacts, coordinate with local agencies, and stay involved until you’re safe.
• Any rescue-related costs, like private evacuation or transport fees, are covered directly. You send the bill, they handle it. No reimbursement process.

You can also use the SOS button for a Good Samaritan call, triggering help for someone else in trouble. No liability, no penalty.

Tracking

Tracking works like other communicators: set a ping interval, and the app creates a breadcrumb trail you can share. If there’s no satellite connection, the device buffers track points and sends them when signal returns. Positioning uses an internal chipset with GPS, GLONASS, Galileo, and BeiDou.

Battery

It’s a small device at 60g, so battery is shorter than a full inReach. With location sharing and a few messages per day: around 2% drain per hour, projecting to about 50 hours. With lighter use it drops to around 1% per hour, getting you closer to 100 hours.

Plans

Two plans. Run the math for your usage before choosing.

Plan	Annual Cost	Per Month	Activation Fee	Messages/Year
Freedom	$79.99	$6.66	$19.99	350
Unlimited	$139.99	$11.66	$9.99	Unlimited

Unlimited live tracking is an optional add-on at $4.99/month. SOS/Overwatch & Rescue is included in both plans. Freedom is $79.99/year with up to 350 messages; Unlimited is $14.99/month or $139.99/year with unlimited messages. If you were going to buy rescue insurance separately anyway, the Freedom plan at $6.66/month covers it and gives you messaging too.