{"data":{"slug":"cmf-watch-3-pro","type":"smartwatch","brand":"CMF","name":"Watch 3 Pro","aliases":["Nothing CMF Watch 3 Pro","D399"],"release_date":"2025-07","url":"https://arkivo.dev/smartwatches/cmf-watch-3-pro","specs":{"series":"CMF Watch","model_numbers":["D399"],"gtins":null,"announce_date":"2025-07-22","status":"available","predecessor":null,"successor":null,"launch_price_usd":99,"launch_price_eur":99,"markets":null,"colors":["Dark Grey"],"manufacturer_url":"https://us.nothing.tech/products/cmf-watch-3-pro","spec_sheet_url":null,"manual_url":"https://device.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdf","eprel_registration_number":null,"warranty_years":null,"segment":"smartwatch","os_updates_years":null,"security_updates_until":null,"case_sizes_mm":[47],"case_shape":"round","case_material":"aluminium","case_material_name":"Metal body","back_material":null,"case_dimensions_mm":{"height_mm":null,"width_mm":47,"thickness_mm":14.4},"weight_g":null,"weight_with_strap_g":null,"water_resistance_atm":null,"water_resistance_standard":"IEC 60529","ip_rating":["IP68"],"dive_rating":null,"dive_max_depth_m":null,"mil_std_810":null,"mil_std_810_tests":null,"operating_temperature_c":null,"display_technology":"oled","display_technology_name":"AMOLED","screen_size_in":1.43,"resolution":{"width_px":466,"height_px":466},"pixel_density_ppi":326,"display_area_mm2":null,"touchscreen":true,"refresh_rate_max_hz":60,"refresh_rate_min_hz":null,"brightness_peak_nits":670,"brightness_min_nits":null,"always_on_display":true,"display_cover_material":"other_glass","display_cover":"Glass","platform":"proprietary","os_at_launch":null,"os_skin":null,"os_latest":null,"compatible_phone_os":["ios","android"],"phone_os_requirement":"Android 6.0 or later, or iOS 13 or later. Uses the Nothing X app.","third_party_apps":false,"voice_assistants":["Paired phone voice assistant","ChatGPT"],"chipset":null,"process_node_nm":null,"cpu_core_count":null,"cpu_clusters":null,"cpu_max_ghz":null,"gpu":null,"low_power_coprocessor":null,"ram_gb":null,"storage_gb":[0.256],"heart_rate_sensor":"Optical heart rate and blood oxygen sensor","ecg":false,"spo2":true,"skin_temperature":false,"blood_pressure":null,"bioimpedance":null,"eda_sensor":null,"medical_clearances":null,"accelerometer":true,"accelerometer_max_g":null,"gyroscope":true,"barometer":null,"compass":null,"ambient_light_sensor":true,"depth_gauge":null,"depth_gauge_max_m":null,"water_temperature_sensor":null,"health_features":["continuous_heart_rate","heart_rate_alerts","blood_oxygen_app","sleep_tracking","sleep_stages","stress_tracking","cycle_tracking"],"fitness_features":["auto_workout_detection","vo2_max","training_load","recovery_advice"],"sport_profiles_count":131,"dive_modes":null,"external_sensor_types":null,"fall_detection":null,"crash_detection":null,"emergency_sos":null,"emergency_siren_db":null,"live_tracking":null,"led_flashlight":null,"positioning":["GPS L1 + L5","GLONASS","Galileo","QZSS","BeiDou"],"dual_frequency_gnss":true,"offline_maps":null,"bluetooth":true,"bluetooth_version":"5.3","wifi":false,"wifi_standard":null,"wifi_bands":null,"cellular":false,"network_technologies":null,"bands_4g":null,"bands_5g":null,"nfc":false,"nfc_payments":false,"payment_services":null,"uwb":null,"satellite_connectivity":null,"ant_plus":null,"speaker":true,"microphone_count":2,"calls_on_watch":"phone_only","offline_music":false,"button_count":0,"hardware_buttons":null,"crown":"rotating","rotating_bezel":"none","gesture_controls":["Cover screen with palm","Wrist flip","Double shake"],"battery_capacity_mah":350,"battery_life_claimed":[{"mode":"smartwatch","with_solar":false,"hours":312},{"mode":"heavy_use","with_solar":false,"hours":240},{"mode":"always_on","with_solar":false,"hours":108},{"mode":"low_power","with_solar":false,"hours":1440},{"mode":"gps","with_solar":false,"hours":17.2}],"battery_life_smartwatch_claimed_h":312,"battery_life_always_on_claimed_h":108,"battery_life_gps_claimed_h":17.2,"solar_charging":null,"charging_method":"magnetic_pins","charging_notes":null,"charging_max_w":null,"fast_charging":null,"quick_charge":null,"charge_time_0_80_min":null,"charge_time_0_100_min":99,"measured_brightness_nits":null,"measured_battery_active_use_h":null,"battery_life_measured":null,"measured_charge_time_min":null,"band_width_mm":22,"quick_release":true,"band_compatibility":"Standard 22 mm quick-release straps","band_material":"silicone","band_name":null,"band_sizes":null,"fcc_ids":null,"sar_limb_w_kg":null,"sar_eu_limb_w_kg":null,"other_certifications":null,"in_the_box":["CMF Watch 3 Pro","Charging cable","User guide and safety information","Warranty information"],"charger_in_box":false},"variants":[],"sources":[{"url":"https://us.nothing.tech/products/cmf-watch-3-pro","kind":"manufacturer_page","accessed":"2026-10-08","fields":["status","colors","manufacturer_url","segment","case_material_name","case_dimensions_mm","water_resistance_standard","ip_rating","display_technology","display_technology_name","screen_size_in","resolution","pixel_density_ppi","refresh_rate_max_hz","brightness_peak_nits","always_on_display","display_cover_material","display_cover","compatible_phone_os","phone_os_requirement","heart_rate_sensor","spo2","accelerometer","gyroscope","ambient_light_sensor","sport_profiles_count","positioning","dual_frequency_gnss","bluetooth","bluetooth_version","speaker","microphone_count","calls_on_watch","battery_capacity_mah","battery_life_claimed","charge_time_0_100_min","band_material","in_the_box","charger_in_box","voice_assistants"],"notes":{"colors":"Selected reference is Dark Grey, maker store SKU 6974434225312. Other finishes have different thicknesses and are not represented as variants.","case_dimensions_mm":"Design table, Dark Grey and Light Green: width 4.7 cm and depth 1.44 cm. The published height of 25.8 cm includes the open strap and is excluded from case height.","ip_rating":"Footnote 12: IP68 under IEC 60529, up to 1.1 m in still clear water for 30 minutes. The maker excludes swimming, hot showers, diving and high-pressure water.","brightness_peak_nits":"Display table: 650 nits typical, up to 670 nits. Screen area and ambient-light conditions are not specified.","refresh_rate_max_hz":"Display refresh table publishes 60 FPS as the refresh rate.","calls_on_watch":"Footnote 10 requires a Bluetooth-connected smartphone. Calls from third-party apps are unsupported.","microphone_count":"Calling section states two MEMS microphones. The D399 guide also labels both microphones.","battery_life_claimed":"Current Battery table: typical 13 days, heavy 10 days, AOD plus heavy 4.5 days, power saving 60 days, GPS 17.2 hours. Days are converted exactly to hours. Typical and heavy modes include 120 minutes GPS and 30 minutes Bluetooth calls per week. Typical includes heart rate every five minutes, 100 screen activations and 100 message views per day. Heavy adds 200 screen activations and message views, six daily manual heart rate and SpO2 checks, and automatic stress and SpO2 every 30 minutes. AOD daily duration and continuous-GPS band settings are not stated here. These are maker laboratory claims. The support FAQ differs: 10.5 days heavy and 4.4 days with 12 hours daily AOD. Current product claims are retained.","charge_time_0_100_min":"Battery table gives a nominal charging time of 99 minutes. Starting percentage and charger conditions are not stated.","charger_in_box":"Complete In the box table lists the watch, charging line and documents. No power adapter is listed.","band_material":"Design table describes a liquid silicon strap. The product text identifies it as silicone.","voice_assistants":"Other features table lists Voice Assistant. The ChatGPT section and footnote 15 state ChatGPT integration and require Nothing OS. Most connected functions require the paired smartphone."}},{"url":"https://device.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdf","kind":"manual","accessed":"2026-10-08","fields":["model_numbers","manual_url","touchscreen","ambient_light_sensor","speaker","microphone_count","charging_method","quick_release","button_count","crown","gesture_controls"],"notes":{"manual_url":"Original maker foldout, version 2, MODEL D399 and WATCH 3 PRO. English panels appear on the single multilingual PDF page.","charging_method":"English Charge panel: two metal pads on the watch align with the metal tips on the charging cable.","button_count":"Product overview and operations panels identify only the rotating, clickable functional crown. No separate operating button is shown.","gesture_controls":"English Operations panel supports covering the watch with a palm to turn the screen off. Gesture Control is configured through Nothing X.","quick_release":"English Change straps panel identifies a quick-release lever at each strap end."}},{"url":"https://support.nothing.tech/hc/en-us/sections/31667497585169-Product-Feature","kind":"manufacturer_page","accessed":"2026-10-08","fields":["health_features","fitness_features"],"notes":{"health_features":"Health monitoring and Enhanced sleep tracking articles list heart rate monitoring and alerts, blood oxygen, stress and sleep stages. The cycle-tracking article uses manually entered cycle data.","fitness_features":"Workout Detection, VO2 Max, Training Load and Recovery Time articles. Automatic detection supports indoor/outdoor running and walking, outdoor cycling, elliptical and rowing. VO2 max needs a moderate or harder running or cycling session of about 15 minutes."}},{"url":"https://support.nothing.tech/hc/en-us/articles/37210042924689-Does-Watch-3-Pro-support-NFC","kind":"manufacturer_page","accessed":"2026-10-08","fields":["nfc","nfc_payments"],"notes":{"nfc_payments":"The watch does not support NFC."}},{"url":"https://www.gsmarena.com/nothing_cmf_watch_3_pro-14217.php","kind":"spec_database","accessed":"2026-10-08","fields":["series","case_material","storage_gb","wifi","cellular"],"notes":{"case_material":"Build row identifies an aluminium frame. Maker design table identifies the body as metal.","storage_gb":"Internal storage 256 MB, converted exactly to 0.256 decimal GB. User-accessible music storage is not implied."}},{"url":"https://www.gsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.php","kind":"press","accessed":"2026-10-08","fields":["release_date","announce_date","launch_price_usd","launch_price_eur","case_sizes_mm","case_shape","microphone_count","gesture_controls","rotating_bezel"],"notes":{"release_date":"Published 22 July 2025. Reports launch and availability in several countries. Dark Grey is named in the launch colour table.","launch_price_usd":"US launch list price $99. Article distinguishes the initial $79 discount. Tax treatment is not stated.","launch_price_eur":"Published European launch price EUR 99. Tax treatment is not stated.","rotating_bezel":"The launch article states that the bezel is fixed in place. Watch Pro 2 modular bezels are not supported."}},{"url":"https://www.gsmarena.com/cmf_watch_3_pro_in_for_review-news-69839.php","kind":"review_site","accessed":"2026-10-08","fields":["band_width_mm","band_compatibility"],"notes":{"band_width_mm":"The review introduction identifies standard 22 mm bands for Watch 3 Pro."}},{"url":"https://www.techradar.com/health-fitness/smartwatches/cmf-watch-3-pro-review","kind":"review_site","accessed":"2026-10-08","fields":["platform","offline_music","case_shape","charging_method"],"notes":{"platform":"Features section identifies proprietary Nothing software.","offline_music":"Features section describes phone music control and no onboard user storage for playback.","case_shape":"Design and display section describes the circular display and circular watch design.","charging_method":"Performance section identifies the magnetic charging puck. The D399 guide separately establishes two metal contacts at the watch."}},{"url":"https://www.wareable.com/smartwatches/cmf-watch-3-pro-review","kind":"review_site","accessed":"2026-10-08","fields":["third_party_apps","skin_temperature"],"notes":{"third_party_apps":"Smart features section explicitly states there is no third-party app support.","skin_temperature":"Health and sleep tracking section explicitly states there is no built-in temperature sensor."}},{"url":"https://indianexpress.com/article/technology/tech-reviews/nothing-cmf-watch-3-pro-review-2026-10761542/","kind":"review_site","accessed":"2026-10-08","fields":["ecg"],"notes":{"ecg":"Health and fitness section explicitly states that the model has no ECG. Measurements and paired-earphone claims are not used."}},{"url":"https://support.nothing.tech/hc/en-us/articles/37210046005777-How-long-does-Watch-3-Pro-s-battery-last","kind":"manufacturer_page","accessed":"2026-10-08","fields":["battery_life_claimed"],"notes":{"battery_life_claimed":"The FAQ differs from the current product table: 10.5 days heavy use and 4.4 days with heavy use plus 12 hours daily AOD. It agrees on 13 days typical use. The current product table claims of 10 days heavy and 4.5 days AOD are retained. The FAQ AOD schedule is not transferred to the product table claim."}},{"url":"https://support.nothing.tech/hc/en-us/articles/37233005379217-How-to-use-ChatGPT-on-my-watch","kind":"manufacturer_page","accessed":"2026-10-08","fields":["voice_assistants"],"notes":{"voice_assistants":"ChatGPT is available only to Nothing phone users. The paired phone needs the ChatGPT app, a logged-in account, microphone permission and a selected conversation voice. Enable ChatGPT through the Nothing X app."}}],"fields_filled":73,"updated":"2026-10-08"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}