Why does your iPhone restart by itself?
DeviceBox reads the panic log your iPhone wrote and tells you in plain words what failed, which part is most likely behind it, and how sure that is.
Answers you can check
Plain words first
The verdict comes in one sentence. With Premium, the exact part, the codes, the rule that matched and its public sources are one tap below.
Never a guess
Every answer says how sure it is, and a log that matches no rule is reported as unknown.
Your logs stay with you
Every log is read on the device. Your logs and photos never leave your iPhone, and there is no account.
Find out why it restarts.
When an iPhone restarts by itself, iOS writes a panic log. Its useful line is buried, its sensor names are codes, and the same code means a different part on another model. DeviceBox reads the whole log for the model that wrote it.
- The verdict in one sentence: where in the phone the fault is
- What to do next, in plain words
- Only have a code? Search it on its own
The exact part, codes and sources. With Premium.
Premium opens everything behind the answer: the part most likely at fault on that model, the codes found in the log, the rule that matched with its public sources, and the raw log itself.
- The part most likely at fault, ranked
- The deciding line of the log, highlighted
- Every rule names where it comes from; search and export the raw log
Check every part, one by one.
Before you sell a phone, after a repair, or when something feels wrong: DeviceBox tests the parts of the iPhone it runs on and lists each one with its status. A test you skip is "Not tested", never a fault.
- Screen colours, touch and multi-touch, speakers, microphones, vibration
- Volume buttons, proximity sensor, Face ID or Touch ID, cameras and flash, charging port
- Screen colours and Touch are free; one short ad a day opens the others, Premium exports the report
The figure behind Maximum Capacity.
Settings shows one rounded number. DeviceBox opens your iPhone's analytics file and puts the health iOS shows next to the health worked out from the battery's own capacity figures.
- Health as iOS shows it, with a verdict
- With Premium: health from the battery's own figures, cycle count and capacity in mAh
- With Premium: how old the battery really is
What this iPhone says about itself.
The exact model behind the marketing name, the iOS it runs, its storage and memory, with live readings that help a diagnosis.
- Model identifier and board code
- Processor, memory, heat and storage, live
- Everything apps cannot read, said plainly
Any iPhone's specs, from any code.
Type what you have in hand: a name, a model identifier from a log, a board code from a panic, the A-number or the part number from Settings.
- Every iPhone from iPhone X on
- Every value comes with its source
- A part number tells how and where the phone was sold
Your last checks on your Home Screen.
A widget refreshes when iOS allows, so it shows what stays true: the last panic check and the battery health last read, each with its date, beside the battery level and storage free.
- The This iPhone widget is free
- One-reading and Lock Screen widgets with Premium
- Updated as soon as DeviceBox reads a new log or analytics file
Where your iPhone keeps its panic logs
Open the analytics logs
Settings › Privacy & Security › Analytics & Improvements › View Analytics Logs (Analytics Data on earlier iOS).
Find the panic log
Its name starts with panic-full and carries the date your iPhone restarted. Type panic-full in the search field at the bottom of the list, if it has one.
Share it to DeviceBox
Tap Share, then DeviceBox. Or copy its text and tap Paste in DeviceBox.
No panic-full file in the list? Then iOS has not recorded a panic since its logs were last cleared. Read the full guide →
The verdict is free
Free, with light ads
- Panic analyzer: the verdict, where the fault is, and what to do
- Battery health: the health iOS shows and its verdict
- One result in full after a short ad
- Device info, Device specs and the This iPhone widget
Premium, one purchase
- Every result in full: the exact part, codes, rule and sources; battery cycles, real health and age
- No ads
- Raw-log search and export
- One-reading and Lock Screen widgets, and every tool added later for owners and buyers
Ads never stand between you and the verdict. The price is shown in the App Store in your currency.
Questions
Does DeviceBox fix my iPhone?
No. It reads the log and tells you what it points at and how sure that is, so you know what to check or what to tell a repair shop.
Where do I find the panic log?
In Settings › Privacy & Security › Analytics & Improvements › View Analytics Logs (Analytics Data on earlier iOS), in a file whose name starts with panic-full. DeviceBox has a step-by-step guide.
Does it upload my logs?
No. Every log is read on your iPhone, and your logs and photos never leave it. The app shows ads and uses Firebase to count which screens are used and to report crashes; nothing from a log or a result is sent.
What if DeviceBox does not know my log?
It says so. A log that matches no rule is reported as unknown, never guessed, with the codes it found.
Which iPhones does it work on?
DeviceBox runs on iOS 17 or later. Device specs covers every iPhone from iPhone X on.
Know why it restarts.
Free on the App Store. Your logs never leave your iPhone.
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