Pricing depends on your model. Series 1/2/3 is R600. Series 4/5 is R800. SE/SE 2 is R900. Series 6 is R1,000. Series 7/8/9 is R1,200. Series 10 and SE 3 are R1,300. Series 11 is R1,500. Apple Watch Ultra (all generations) ranges R1,500–R1,800 due to the larger sapphire crystal back. We confirm exact pricing in writing after your free diagnostic.

No. The heart rate sensor, ECG electrodes, and blood oxygen photodiode are all bonded to the back glass as a single sealed assembly — Apple doesn't manufacture them as separate components. If any sensor fails permanently, the entire back assembly must be replaced. Sometimes minor failures are caused by skin oils or sunscreen on the sensor surface — clean the back of the Watch with a damp cloth before booking, in case that's all it needs.

Three common causes: surface contamination (skin oils, sunscreen, hand cream — clean the back), sensor failure (electrical issue requiring assembly replacement), or wrist fit (Watch worn too loose can't get a clean signal). Try cleaning and tightening the strap first. If readings are still missing or wildly wrong on a clean Watch worn correctly, the sensor itself has failed and needs replacement.

Both need recalibration after a back assembly swap, otherwise readings will be inaccurate or unavailable. We perform calibration as part of every back glass repair using calibrated test signals. Your ECG and SpO2 features will work normally afterward — no software setup needed on your end beyond pairing back to your iPhone if pairing was lost during repair.

Honest answer: any opened Apple Watch will have reduced water resistance compared to factory new — this matches Apple's own policy. We replace the back glass gasket and use professional cold-press adhesive equipment to reseal the watch as effectively as possible. Splashes, rain, and hand washing remain fine. We recommend avoiding swimming, surfing, hot tubs, and steam rooms post-repair.

Most back glass replacements are completed within 24–48 hours. The repair itself is straightforward; the rate-limiting step is sensor calibration and the cold-press adhesive cure. For nationwide repairs via The Courier Guy, total turnaround is 2–3 working days door-to-door on overnight service, 5–7 working days on standard.

Yes, but bring it in immediately. Visible moisture under the back crystal means the gasket has failed and water has reached the inside of the case. The back glass needs replacement (with a new seal), but more importantly the main board needs inspection and ultrasonic cleaning before corrosion damages it. Don't wait — corrosion can become unrepairable within days of moisture exposure.

Yes — all Apple Watch back glass and sensor replacements at iAssist are covered by a 6-month warranty on parts, labour, and sensor calibration. If any sensor stops working or the back glass develops issues within six months, we fix it at no charge.

Yes — we work with The Courier Guy for fully insured nationwide collection and delivery. After we send you a fixed-price quote, The Courier Guy collects from your door and delivers it back once repaired. Total turnaround is 2–3 working days for overnight, 5–7 working days for standard.