What They Have in Common
Both run the Garmin Golf app, preload 43,000+ courses, use AMOLED color touchscreens, and include AutoShot automatic shot detection. Both track scoring, require Garmin's proprietary ecosystem, and are tournament-legal. That's a solid shared foundation — the course coverage alone means neither will leave you hunting for your home course.
Where They Differ
Size, Weight, and Who It's For
The J1 weighs 29 grams. The S70 weighs 56 grams — nearly double. That gap exists by design. The J1 was built specifically for junior golfers, where swing mechanics are still developing and wrist weight actually matters. A 29g watch feels like you're wearing a fabric band with a screen. A 56g watch you notice on your wrist, especially through a full swing when you're 14 years old.
The case size follows the same logic: 43mm versus 47mm. The J1 will sit proportionally on a smaller wrist; the S70 is sized for an adult hand. Neither is uncomfortable for its intended user — it's just that the intended users are different people.
Features the S70 Has That the J1 Doesn't
This list is long. The S70 includes Virtual Caddie with AI club recommendations that factor in wind, elevation, swing history, and shot dispersion. The J1 doesn't have Virtual Caddie. The S70 has green contours (membership-locked, more on that below), plays-like distances with a built-in barometer accounting for elevation and air pressure, wind data, strokes gained, heart rate monitoring, sleep tracking, smart notifications, contactless payments, and 32GB of music storage. The J1 has none of those.
If you're comparing these as GPS golf computers for an adult, the S70 is the better device on nearly every technical dimension.
Subscription Math
Both watches offer free GPS with basic distances. Green contours and enhanced features require a Garmin Golf membership: $9.99/month or $99.99/year. The difference is that the S70 actually unlocks green contours with that membership — the J1 has a flat green view regardless. So if you buy a J1 and add a membership, you're paying $99/yr for enhanced maps and shot analytics, but you still won't get contour reads. Three-year cost with membership: J1 at $599, S70 at $999. Without membership: J1 at $300, S70 at $700.
For a junior golfer who doesn't need green contours yet, the J1's free tier is probably sufficient. Call it a hunch, but most juniors learning course management aren't reading break from a wrist display.
Charging and Glass
The S70 charges via USB-C. The J1 uses Garmin's proprietary charger — the kind you lose at the bottom of a golf bag. For an adult who travels with gear, USB-C is genuinely more convenient. For a kid whose parent manages the charging routine, it's less of a problem. The S70 also uses Corning Gorilla Glass 3 versus chemically strengthened glass on the J1, and has a ceramic bezel versus anodized aluminum. The S70 is built to take harder daily abuse over years of use.
Battery life: 15 GPS hours on the J1, 20 on the S70. Both are more than enough for any round.
Who Should Buy Which
Get the Garmin Approach J1 if:
- You're buying for a junior golfer who needs a proper GPS watch without the weight, bulk, or price of a flagship
- Swing mechanics are a priority and you don't want any excess wrist weight during development
- Budget is around $300 and core GPS features — yardages, hole maps, shot tracking, scoring — are all that's needed
- You want the Garmin Golf ecosystem without paying $700 for features a junior won't use yet
Get the Garmin Approach S70 (47mm) if:
- You're an adult golfer who wants a full-featured golf and lifestyle watch
- Virtual Caddie, wind data, plays-like distances, and green contours (membership required) are features you'll actually use
- You want music on the course, smart notifications, heart rate tracking, and contactless payments in one device
- The $400 price gap is reasonable given how much more device you're getting
The Bottom Line
These are different watches for different golfers. The J1 nails a specific brief — affordable, ultralight AMOLED GPS for junior golfers — and the S70 is a flagship for adults who want everything. Comparing them head-to-head mostly clarifies that they're not actually competing. If you're shopping for yourself as an adult golfer, the S70 is the better device. If you're shopping for a junior, the J1 is the right call and the S70's extra features would go mostly unused.
Get the Garmin Approach S70 (47mm). (Unless you're buying for a junior — in which case, get the Garmin Approach J1.)