Amazfit GTS 4

Security Grade

Calculator v1

Amazfit GTS 4

   Brand: Amazfit (Parent: 华米科技 (Zepp Health))

   Category: Smartwatch • Model / Gen:

   Release Date: 2022-09-09 • Status: End of sale

   Classification Date: 2026-10-26 • Official Website

Security Evaluation

Criterion	Value	Proof	Comment
Known hardware tampering	None	—	No known hardware tampering issues reported for this smartwatch.
Known vulnerabilities	Rare	—	No major public CVEs specific to this model; firmware issues are handled through OTA updates from Zepp Health.
Prior attacks	Rare	—	No widely reported attacks targeting this model; limited attack surface, generic wearable risks apply.
Updatability	Rare	🔗 Proof	OTA firmware updates delivered via the Zepp app; this 2022 model is end of sale and major update support has wound down.
Category Score	Score: 2 / 3

Criterion	Value	Proof	Comment
Authentication with other systems	Partial	—	Pairs with the Zepp companion app over BLE and syncs with a Zepp cloud account; no third-party system integration beyond the vendor ecosystem.
Communications	Encrypted with up-to-date encryption	—	Bluetooth LE encrypted pairing with the phone and TLS-encrypted cloud sync per vendor privacy policy.
Storage	Encrypted with up-to-date encryption	—	Health data encrypted in transit via TLS and at rest in the Zepp cloud per vendor privacy policy; on-device storage encryption not publicly documented.
Category Score	Score: 2 / 3

Criterion	Value	Proof	Comment
Account management	Full	—	Full Zepp account management in the app: registration, profile, device binding and account deletion.
Authentication	Basic	—	Zepp account sign-in with email and password only; the watch itself has no lock screen or biometric authentication.
Brute-force protection	Basic	—	No public documentation of server-side lockout or rate limiting for Zepp account sign-in; standard throttling assumed, conservative rating.
Event logging	Partial logging	—	Activity and sync events visible in the app, but no user-accessible security event log.
Passwords	Require change after setup with complexity requirements	—	User-created password required at Zepp account registration with basic complexity rules; no default password.
Category Score	Score: 2 / 3

Property	Details
Operating System & App	Zepp OS (Companion App: Zepp)
Hardware (CPU / GPU)	CPU: • GPU:
Memory & Storage	Memory: • Storage:
Power, Battery & Charging	Battery: 300 mAh • Power: • Charging: Magnetic charging cable
Display & Camera	Display: 1.75-inch AMOLED 390 x 450 • Camera: None
Sound & Connectivity	Sound: Speaker and microphone (Bluetooth phone calls) • Connectivity: Bluetooth 5.2, GPS
Physical (Dimensions & Mass)	Dimensions: 43.36 x 36.16 x 9.9 mm • Mass: 27 g (without strap)