--- title: How I investigated why my iPhone was running hot | daily.dev description: A developer investigates why their iPhone was running hot using USB diagnostics, crash reports, and Xcode Instruments. The process involves installing... canonical: https://daily.dev/posts/how-i-investigated-why-my-iphone-was-running-hot-4hfdh5qzs twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How I investigated why my iPhone was running hot | daily.dev og:description: A developer investigates why their iPhone was running hot using USB diagnostics, crash reports, and Xcode Instruments. The process involves installing... og:url: https://daily.dev/posts/how-i-investigated-why-my-iphone-was-running-hot-4hfdh5qzs og:image: https://api.daily.dev/og/posts/4hfdH5qzs.png og:image:alt: How I investigated why my iPhone was running hot og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How I investigated why my iPhone was running hot **[Flavio Copes](https://daily.dev/sources/flaviocopes)** · 7 min read · 0 upvotes · 0 comments ## Summary A developer investigates why their iPhone was running hot using USB diagnostics, crash reports, and Xcode Instruments. The process involves installing pymobiledevice3 to read battery diagnostics and historical CPU resource reports, which revealed that photoanalysisd (Apple's Photos analysis service) had repeatedly exceeded iOS CPU limits. Enabling Low Power Mode deferred that work, but a live Instruments trace showed other processes like fseventsd (72.7% CPU), fileproviderd (42.5%), and Twitter (peaking above 300%) were still active. Despite the investigation, no single definitive cause was identified — the battery was healthy, but multiple system services were doing significant background work. Practical advice includes restarting the phone, enabling Low Power Mode, and recording a deferred Activity Monitor trace with Instruments. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Beyond the Benchmark: A Metrics-Driven Approach to Sustained iOS Performance on Real Devices](https://daily.dev/posts/beyond-the-benchmark-a-metrics-driven-approach-to-sustained-ios-performance-on-real-devices-lzgk2pnlu) · InfoQ · 1 upvotes · 0 comments - [What iPhone Developer Mode does, and when you should enable it](https://daily.dev/posts/what-iphone-developer-mode-does-and-when-you-should-enable-it-fmpbi0oik) · Flavio Copes · 0 upvotes · 0 comments - [3 simple settings I changed to stop my Pixel from overheating](https://daily.dev/posts/3-simple-settings-i-changed-to-stop-my-pixel-from-overheating-qcvm44jd3) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#ios](https://daily.dev/tags/ios), [#xcode](https://daily.dev/tags/xcode) [View this post on daily.dev](https://daily.dev/posts/how-i-investigated-why-my-iphone-was-running-hot-4hfdh5qzs) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How I investigated why my iPhone was running hot","url":"https://daily.dev/posts/how-i-investigated-why-my-iphone-was-running-hot-4hfdh5qzs","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-i-investigated-why-my-iphone-was-running-hot-4hfdh5qzs"},"datePublished":"2026-07-11T16:08:02.384Z","dateModified":"2026-07-11T16:08:24.320Z","description":"A developer investigates why their iPhone was running hot using USB diagnostics, crash reports, and Xcode Instruments. 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