Swimming · Fitness Tech

FORM Smart Swim 2 LT vs. Smart Swim 2 vs. Smart Swim 2 PRO: Which Goggle Should You Buy?

All three FORM Smart Swim 2 goggles share the same augmented reality platform, stroke detection, and FORM Swim System. The differences come down to heart rate monitoring, lens durability, and how seriously you take your fog prevention. Here's exactly what you're paying for at each price point.

Updated 2025 · 7 min read

What Makes FORM Different from Other Swim Goggles

Swim training has always had a feedback problem. Unlike running or cycling, where you can glance at a watch mid-workout, swimming requires you to stop, look at the pace clock, and mentally reassemble what just happened. By the time you've processed the information, your heart rate has dropped and the moment has passed.

FORM solves this with an in-goggle augmented reality display — a heads-up display built directly into the lens using patented Waveguide technology. Real-time metrics like pace, distance, stroke rate, stroke count, and heart rate appear in your line of sight as you swim, without requiring you to stop or look away. The display is driven by advanced motion sensors and machine learning that automatically detects your stroke type, counts laps, and identifies rest periods — no manual input required.

The result is a fundamentally different kind of swim workout: one where you're informed and in control at every moment rather than guessing until the wall.

All three Smart Swim 2 models are race-approved by World Triathlon, USA Triathlon, British Triathlon, and PTO supertri — meaning everything you use in training works on race day.

FORM Smart Swim 2 LT — The Streamlined Entry Point

What you get

Don't let the "LT" designation undersell it. The Smart Swim 2 LT has the same augmented reality waveguide display, the same SwimStraight™ digital compass for open water navigation, the same automatic stroke detection, and the same app ecosystem as the more expensive models. If your training doesn't revolve around heart rate zones — or if you use a chest strap or external monitor — you're not giving up anything that affects swim quality.

What you're trading off

The only hardware omission is the optical heart rate sensor. This isn't a minor accessory — heart rate is central to zone-based training, aerobic development, and recovery-aware pacing. Swimmers who structure workouts around heart rate targets, or who want post-swim cardiovascular data, will find the LT genuinely limiting. Swimmers who train by pace, distance, or feel will likely not miss it.

The LT also uses a standard mirrored lens with a factory-applied anti-fog coating, rather than the scratch-resistant Gorilla® Glass on the PRO. For most swimmers in normal training conditions this is a non-issue — but frequent outdoor swimmers or anyone hard on their gear may find the standard lens shows wear faster.

FORM Smart Swim 2 — The Well-Rounded Choice

The heart rate sensor changes everything

Heart rate is the single most useful real-time metric in endurance sport. It tells you whether you're in an aerobic base zone or pushing into threshold, whether your perceived effort matches your actual exertion, and whether your fitness is trending in the right direction over time. Without it, pace and distance tell you what you did — with it, you understand how your body responded to what you did.

The Smart Swim 2's built-in optical heart rate sensor delivers this data in real time, directly in your line of sight. You can see your heart rate climbing during a hard interval, watch it recover during rest, and track cardiovascular trends across swims in the FORM app — without pausing, stopping, or checking your wrist.

Award recognition

The Smart Swim 2 earned the 2024 Sports Technology Award for Best Mechanical, Engineered, and Wearable Technology — dubbed the "Oscars of Sports Technology" — and the 2024 GOOD DESIGN® Award in the Sports & Recreation category. These aren't participation awards; the Sports Technology Award shortlist is competitive, and GOOD DESIGN is the world's oldest design accolade.

FORM Smart Swim 2 PRO — Built for Serious Swimmers

Gorilla® Glass — what it actually means

Gorilla® Glass is an alkali-aluminosilicate glass developed by Corning and engineered for exceptional scratch and impact resistance. It's the same material used in the screens of flagship smartphones precisely because it maintains optical clarity under daily wear and contact that would scratch or degrade conventional glass or polycarbonate.

In a swimming context this matters more than it might seem. Goggle lenses come into regular contact with pool decks, gear bags, other equipment, and the occasional accidental fingernail — conditions that gradually cloud standard lenses. The PRO's Gorilla® Glass maintains its optical quality longer, which means a cleaner AR display experience over the lifetime of the goggle.

The anti-fog trade-off

Here's something worth understanding before buying: the PRO trades the factory-applied anti-fog coating of the LT and Smart Swim 2 for an included anti-fog spray. These are different approaches to the same problem, and neither is strictly better.

Factory coatings are applied once during manufacturing and require no maintenance — but they degrade over time and cannot be reapplied. Anti-fog spray requires application before each swim, which adds a small step to your pre-swim routine, but it can be reapplied indefinitely and tends to offer fresher, more effective fog prevention per application. For serious swimmers who train daily and prioritize display clarity above all else, the spray approach is arguably superior — but it does require the habit.

Side-by-Side Comparison

Here's a complete breakdown of how the three models compare across every key spec and feature.

Which Model Is Right for You?

All three models share the same core technology. The decision comes down to whether you need heart rate monitoring and how much lens durability matters to your training.