Withings Steel HR 40mm Hybrid Smartwatch - 25-Day Battery And 50-Meter Water Rating

Withings Steel HR 40mm Hybrid Smartwatch keeps classic analog hands above a compact digital display, pairing a 39.5mm case with long battery life and everyday activity tracking for US buyers who still want a traditional watch look.TechCrunch's review documents the dual-display design and notes that the Steel HR line launched with 36mm and 40mm sizes.

Design, Case Size And Water Resistance

The Steel HR 40mm uses a round case Withings lists at 39.5mm in diameter and 13mm thick, with a watch-only weight of 49g, giving it the dimensions of a mid-size analog wristwatch rather than a chunky fitness band.Ad Hoc News' product summary cites those numbers from Withings' listings.

The watch carries a 50-meter water resistance rating, which allows swimming and shower use and places it above many basic fitness trackers limited to splash resistance.A Steel HR overview describes the device as water-resistant to 50 meters and suitable for pool sessions.

Battery Life And Activity Tracking Features

Withings positions the Steel HR line around battery endurance, and the company rates the watch at up to 25 days of battery life in normal use before switching into a power-reserve mode that extends tracking for roughly 20 more days with limited features.The Steel HR product sheet lists the 25-day standard battery figure plus the additional 20-day reserve mode.

The hybrid smartwatch tracks continuous heart rate during workouts, daytime average heart rate, and overnight heart rate while sleeping, and it counts steps, distance, and calories burned through built-in activity tracking.An activity overview highlights heart rate, steps, distance and calorie metrics along with basic smartphone notification support.

For sleep, Steel HR offers automatic monitoring and uses its internal sensors to generate a sleep profile, while its vibrating alarm aims to wake the wearer during lighter sleep phases.The same overview notes an intelligent alarm that targets the lightest sleep stage.

Compatibility, Platforms And App Integration

Steel HR connects to smartphones via Bluetooth and pairs with the Withings Health Mate app, with the official product sheet listing support for iOS 8 and higher and Android 6 and higher, so it covers most modern phones in the US market.The Withings document spells out the iOS and Android version requirements.

Notifications for calls, texts and calendar events appear on the small digital display along with vibration alerts, keeping smartphone messaging discreet compared with full-screen smartwatches.An overview of the watch's features notes that incoming calls, texts and event alerts are shown on the display.

Pricing And Comparison With Steel HR 36mm

At launch, the Steel HR 40mm carried a US price of $199.95, while the smaller 36mm version launched at $179.95, putting a $20 gap between the two case sizes.NokiaPowerUser's launch coverage lists the same figures in US dollars, and TechCrunch's review echoes the $180 and $200 price points.

More recent market coverage points to legacy pricing well below those launch figures, with a late-2026 snapshot putting remaining Steel HR 40mm stock around $99.99 in the US, indicating a budget-friendly position compared with newer hybrid and full smartwatches.A US-focused product article reports the $99.99 price as of 09/09/2026.

The 36mm Steel HR shares the same 25-day battery claim but uses a smaller case, with launch coverage placing that model at $179.95 and later US write-ups noting similar discount levels down to $99.99, which means case size rather than core features separates the two watches.A Steel HR 36mm overview lists the 36mm case, the 25-day battery claim and a $99.99 US price snapshot.

Position In The Hybrid Smartwatch Segment

Within the hybrid smartwatch segment, Steel HR 40mm targets wearers who want multi-week battery life and basic smartwatch alerts without giving up a conventional analog dial, and its 50-meter water rating and continuous heart rate tracking address routine fitness and sleep monitoring rather than advanced training metrics.A later Steel HR Sport review describes Withings hybrid models as closer to fitness trackers than full smartwatches, emphasizing battery life and basic notifications.

For US shoppers comparing options, Steel HR 40mm now counts as a legacy hybrid with a documented 25-day battery window, 39.5mm case size and 50-meter water resistance, and its discounted pricing positions it as a way to add structured activity and sleep tracking without moving into the higher price tiers of newer OLED smartwatches.