What They Have in Common
Both run on Garmin's platform, pull from the same 43,000-course database, and use AMOLED touchscreens with full-color hole maps. Both support AutoShot detection, scoring, and hazard views. Both share the same 1-year warranty and require Garmin Golf membership ($99.99/yr) to unlock anything beyond basic yardages.
Where They Differ
The Weight Thing Is the Whole Story on the J1
The J1 weighs 29 grams. That's lighter than most pens. Garmin built this watch specifically for junior golfers, and the ultralight ComfortFit elastic band is part of that — the idea being that a heavy watch on a developing swing creates bad habits. At 29g, you barely know it's there.
The S70 is 56 grams — still light for what it does, but nearly double the J1. For an adult, 56g on your wrist is fine. For a 12-year-old developing swing mechanics, I'd guess Garmin's engineers thought twice about that number, which is probably why the J1 exists at all.
Golf Features: The Gap Is Wide
The S70 has Virtual Caddie. The J1 doesn't. That matters more than it sounds — Virtual Caddie factors in wind, elevation, barometric pressure, swing history, and shot dispersion to suggest a club. The J1 gives you yardages. The S70 tells you what to hit.
Plays-like distances (accounting for elevation and conditions) are S70-only. Wind data is S70-only. Green contours are technically on both watches, but they require Garmin Golf membership on both — the J1 just shows a flat green view regardless, while the S70 unlocks actual contour maps with that membership.
Strokes gained: S70 has it. J1 doesn't. If you're tracking your game seriously, that's a real missing piece on the J1. The J1 tracks shots and scores, which is solid for a beginner or junior getting into stats for the first time.
Smartwatch Features: Not Even Close
The S70 is a proper smartwatch. Heart rate monitoring, sleep tracking, 32GB of music storage, Garmin Pay for contactless payments, smart notifications, Wi-Fi — it's a Garmin Fenix-lite with a golf brain. You can leave your phone in the bag for most of a round.
The J1 has fitness profiles and not much else. No heart rate, no notifications, no music, no payments. Which is fine for what it is — a purpose-built junior golf watch — but if an adult is comparing these two, the J1 is going to feel pretty stripped down.
Battery, Display, and Build
S70 gets 20 hours in GPS mode and 16 days in watch mode. J1 gets 15 hours GPS and 10 days watch mode. Both are fine for a round; neither is going to die on hole 14. But the S70 charges via USB-C, which is universally convenient. The J1 uses Garmin's proprietary charger, which means another dongle to track.
The S70 has a ceramic bezel and Gorilla Glass 3 lens. It's built to absorb some life. The J1 uses anodized aluminum and chemically strengthened glass — both solid, but the material gap is real at a $400 price difference.
Who Should Buy Which
Get the Garmin Approach J1 if:
- You're buying for a junior golfer who needs something ultralight that won't interfere with swing development
- Budget matters and $300 with AMOLED and 43,000 courses is genuinely good value for what it delivers
- Your young golfer is just getting into tracking their game and doesn't need strokes gained or Virtual Caddie yet
- You want a minimal, golf-specific wearable without the full smartwatch package
Get the Garmin Approach S70 (47mm) if:
- You're an adult golfer who wants one wrist device that covers golf, fitness, and daily wear
- Virtual Caddie and plays-like distances are features you'll actually use, not just ones you paid for
- You want music on course and Garmin Pay at the turn so you can leave your phone behind
- You're tracking your game seriously and want strokes gained in your post-round review
The Bottom Line
The J1 is a genuinely clever piece of design for a specific buyer. 29 grams, AMOLED, 43,000 courses, $300 — for a junior golfer, that's a strong package. For everyone else, it's a stripped-down adult watch wearing junior clothes.
The S70 costs $400 more and earns most of it. Virtual Caddie, plays-like distances, heart rate, music, USB-C, ceramic bezel — these aren't spec-sheet checkboxes, they're features you'll use before, during, and after your round. Factor in that you'd pay $99.99/yr for Garmin Golf membership on either device to unlock green contours, and the S70 is the better value per feature at almost every level.
Get the Garmin Approach S70.