Apple has confirmed that the iOS 26 update may cause iPhones to run slower and drain battery power more quickly in the days following installation.The company explained that this is normal behavior as the system completes a series of background tasks such as indexing, optimizing files, and integrating new features.
During this period, users may notice sluggish performance and increased heat, especially when running resource-heavy apps like games, video streaming, or the camera. Apple assures customers that these effects are temporary and should resolve once background processes finish.
Why the Update Impacts Performance
Each major iOS release introduces new features that demand more from the hardware. With iOS 26 described as the biggest overhaul since iOS 7, Apple notes that some permanent changes in performance and battery life are possible. More advanced graphics and processing tasks require additional power, which can affect older devices more noticeably.
Thermal spikes are also expected as processors work harder during the update period. While iPhones include built-in safeguards against overheating, Apple advises users to practice safe charging habits. For example, avoid charging devices under pillows or in enclosed spaces where heat can build up.
Tips for Managing the Transition
To minimize disruption, Apple suggests charging phones more often in the first few days after updating. Carrying a backup power bank can help those who rely heavily on their devices for work, navigation, or rideshare services. Users should also keep an eye out for additional updates, as Apple typically rolls out fixes to address early bugs and stability issues.
The Bigger Picture
Performance dips after major updates are not unique to iPhones. Other Apple devices, including iPads and Macs, may also show reduced efficiency until background processes settle. For most users, the temporary slowdown is a small trade-off for gaining the new features and improvements bundled with iOS 26.
