How to Connect Galaxy Watch 4 Classic to Your iPhone.
Yes. The Galaxy Watch 4 Classic works with iPhone. Pair it with the Lynio app and you get calls, notifications, contacts and health sync in about 3 minutes. See how
Stainless steel, a physical rotating bezel, and the first Samsung watch to run Wear OS instead of Tizen.
About the Galaxy Watch 4 Classic
Released August 2021 from $349.99, and the one people still hunt for. Samsung built it in 316L stainless steel with a physical rotating bezel, then dropped the bezel for two full generations before bringing it back on the Watch 6 Classic. For a long stretch this was the only way to get one.
It shares its internals with the plain Watch 4: the Exynos W920, 1.5GB of RAM, 16GB of storage, and the BioActive sensor that reads heart rate, ECG and body composition from a single chip. Samsung ended software support in September 2026, five years after launch, having delivered four operating system upgrades. It finishes on Wear OS 6 with One UI 8 Watch, which is current software. Nothing switches off. What stops is new features and future security patches.
| 42mm | 46mm | |
|---|---|---|
| Case | 46.5g, 316L stainless steel | 52g, 316L stainless steel |
| Controls | Physical rotating bezel | Same |
| Display | 1.2in, 396 x 396 | 1.4in, 450 x 450 |
| Front glass | Gorilla Glass DX | Same |
| Chip | Exynos W920, 5nm, dual-core 1.18GHz | Same |
| Memory | 1.5GB RAM, 16GB storage | Same |
| Battery | 247mAh, up to 40h claimed | 361mAh, up to 40h claimed |
| Durability | 5ATM, IP68, MIL-STD-810G | Same |
| Cellular | LTE variant with eSIM | LTE variant with eSIM |
| Bluetooth | 5.0 | 5.0 |
| GPS | GPS, GLONASS, BeiDou, Galileo | Same |
| Sensors | ECG, body composition, SpO2, barometer. No temperature sensor | Same |
| Final software | Wear OS 6, One UI 8 Watch. Support ended September 2026 | Same |
Connect in 3 Steps
Install Lynio Watch on your Galaxy Watch 4 Classic
From the Play Store on the watch. If Google sign-in will not work there, Lynio sends the app across as a signed bundle over Wi-Fi instead.
Follow the in-app pairing guide
Keep both on the same Wi-Fi, Bluetooth on, and leave the app open until pairing finishes.
What You Get After Pairing
| Works | Does not carry over |
|---|---|
| Notifications from your iPhone | Samsung Pay and Samsung Wallet |
| Calls, made and answered from the wrist | Samsung Health's phone app |
| Contacts synced from the iPhone | Bixby |
| Music playback control | Body composition history in Samsung's own app |
| Workouts and health data written to Apple Health | |
| The rotating bezel, ECG hardware, GPS |
Lynio needs Wear OS 3.0 or later. This watch finishes on Wear OS 6, three versions clear, so Samsung ending updates changes nothing about pairing.
Frequently Asked Questions
No. A Galaxy Watch is the one case where an Android phone is not needed at any point, including first-time setup.
No. Lynio needs Wear OS 3.0 or later, and this watch finishes on Wear OS 6, three versions clear of that. Samsung ending updates changes nothing about pairing.
Yes. It's a hardware control handled entirely by the watch, so it works the same regardless of the phone.
References
- GSMArena Galaxy Watch4 Classic spec page: sizes, weights, 316L steel, rotating bezel, chip, memory, Bluetooth, GNSS, durability.
- GSMArena launch coverage, August 2021: pricing, battery capacities, BioActive sensor.
- Samsung Mobile Security work scope: Watch 4 and Watch 4 Classic absent from the quarterly list as of September 2026.
- Android Authority, September 2026: support ended, four OS generations delivered.
- SamMobile, September 2026: final update was the August 2026 security patch.
- 9to5Google, December 2025: One UI 8 Watch reaching the Watch 4 Classic, build R880XXU1JYK4.
