I have owned an iPhone for over a decade and I would still fail a quiz on what half of its settings menu actually does. Most of us set the phone up once, ignore the notification badge on Settings, and never go back. I finally went through it properly this year, screen by screen, and five changes were worth the twenty minutes it took to find them. None of them are hidden tricks — they are just switches Apple ships turned off by default, for reasons that mostly make sense once you know what they trade away.
I am not going to pretend this is an exhaustive audit. It is the five that changed something I noticed within a week of switching them on, in the order I found them.
1. Stolen Device Protection — the one I should have turned on two years ago
This shipped quietly in an iOS update and I only found it because a friend's phone was snatched from a café table while it was unlocked. Once a thief has your device and your passcode, they can lock you out of your own Apple ID inside minutes — change the password, turn off Find My, and the phone is theirs to keep or sell before you have even noticed it is gone.
Stolen Device Protection closes that window. When your iPhone is somewhere it does not recognise as familiar, it forces a one-hour delay plus a second Face ID check before anything sensitive can change — your Apple ID password, Find My, saved passwords in Settings. A thief with your passcode still cannot do the one thing that actually locks you out permanently, and you get an hour to mark the phone as lost from another device.
It is under Settings > Face ID & Passcode, scroll to the bottom. Takes about ten seconds and does nothing until the exact scenario it was built for happens, so there is no downside I have found in six weeks of it being on.
2. Locking the Hidden and Recently Deleted photo albums
I assumed these two albums were already protected, because they are named like a privacy feature. They are not, by default — anyone who picks up your unlocked phone and opens Photos can tap straight into both, no extra step required. The Recently Deleted album in particular holds everything you have thrown away in the last thirty days, which is often the exact thing you deleted because you did not want it seen.
Settings > Photos has a toggle, low down the page, that puts Face ID or Touch ID in front of both albums. It is one of those defaults that only makes sense if you assume nobody else ever touches your phone — and someone occasionally will, to show you a photo or borrow your maps.
3. Back Tap — the shortcut I now use more than the lock screen widgets
Back Tap has existed since iOS 14 and I ignored it for years because it sounded like a gimmick. It lets you assign an action to a double or triple tap on the back of the phone, and I now use it constantly: double tap opens the camera, triple tap toggles the flashlight. Both fire through a case, and both are faster than unlocking the phone and hunting for the app.
It is buried under Settings > Accessibility > Touch > Back Tap, which is exactly why nobody stumbles onto it by accident — Accessibility reads as a menu for other people. Worth five minutes of anyone's time regardless of whether you need any of Apple's actual accessibility features.
4. Offload Unused Apps
My phone was permanently a few gigabytes from full, and I kept manually deleting apps to make room for a software update, which is a bad way to spend an evening. Offload Unused Apps, under Settings > App Store, removes the app binary for anything you have not opened in a long time while keeping its documents and data in place — open it again and it re-downloads and picks up exactly where it left off.
It sounds like it should be the default and is not, presumably because Apple would rather you notice storage running low than have apps quietly vanish from your home screen without you asking. Reasonable caution, but worth switching on once you know what it actually does.
5. Reviewing (and mostly turning off) Significant Locations
This is the one that unsettled me. Under Settings > Privacy & Security > Location Services > System Services > Significant Locations is a list, with dates, of the places your phone has decided matter to you — home, the gym, a relative's house, a hotel from a trip eight months ago. Apple keeps it encrypted on-device and uses it for things like predicting your commute time and grouping Photos memories, so it is not being sent anywhere as a privacy leak. It is simply a detailed log that most people, me included, had no idea existed until they went looking.
I did not turn the feature fully off, because the traffic predictions are genuinely useful on the drive to the gym. I did turn off the sub-toggles I could not name a reason for, which was most of them, and I would recommend the same: open the screen once, read what it has logged, and decide from an informed position rather than an assumed one.
Where this actually leaves me: none of these five took more than a minute individually, and together they took about the twenty minutes I mentioned at the top. The theme running through all five is the same — Apple ships the safer or more private option turned off, not because it is wrong, but because the more permissive default is what most people expect and never ask to change. Going looking is the whole trick.
The one habit that made the rest worth having
None of these five settings matter much if the thing protecting them — your passcode and whatever you use to sign into everything else — is weak or reused. I went through the same exercise with my own login habits when I worked out what was actually replacing my password manager and what wasn't, and the honest answer is that Stolen Device Protection is only as good as the passcode a thief cannot simply watch you type.
If going through Settings screen by screen sounds like something you would rather automate than repeat, Apple Shortcuts can build a one-tap routine that checks a handful of these for you and flags anything that has drifted back to default after an update — which happens more often than Apple would like to admit.
What I would actually do this week
Start with Stolen Device Protection and the photo album lock — they are the two-minute wins with no real trade-off. Back Tap and Offload Unused Apps are pure convenience, so do them whenever you have a spare moment. Significant Locations is the one worth sitting down with properly, because the value is in actually reading what it has recorded before deciding what to do with it, not in flipping the switch on autopilot the way I did with the other four.
Knowing where the Recently Deleted album lives is worth rather less than not needing it. The photo backup system I actually run is the boring version of that — set up once, and it removes the whole category of panic.
Questions people actually ask
What is Stolen Device Protection on iPhone?
It is an iPhone security feature that adds a one-hour delay, plus a second Face ID or Touch ID check, before sensitive actions can be completed when your phone is away from a familiar location — things like changing your Apple ID password, turning off Find My, or viewing saved passwords. It exists specifically to stop someone who has watched you type your passcode from locking you out of your own account within minutes. Turn it on under Settings > Face ID & Passcode.
Does turning on these settings slow my iPhone down?
No, and that surprised me too. Stolen Device Protection, Back Tap and the Photos privacy toggle do nothing until the specific condition they watch for actually happens. Offloading unused apps frees storage rather than using more of it. None of them run a background process that costs battery or noticeable performance.
Where do I find Back Tap on iPhone?
Settings > Accessibility > Touch > Back Tap. You can assign one action to a double tap on the back of the phone and a different one to a triple tap — mine are set to open the Camera and toggle the flashlight. It works through most cases, though a thick one can make the tap register less reliably.
What does Offload Unused Apps actually delete?
It removes the app itself but keeps its documents and data, so re-downloading it from the App Store restores everything as it was. It only affects apps you have not opened in a long time, and it triggers automatically once you turn it on under Settings > App Store — it will not touch anything you use regularly.
Should I turn off Significant Locations on iPhone?
It depends what you use it for. Apple encrypts the list on-device and uses it for features like traffic-time predictions and Photos memories, so there is no cloud privacy exposure most people need to worry about. The reason to review it under Settings > Privacy & Security > Location Services > System Services > Significant Locations is simply to see how detailed the log actually is — mine held a precise, dated history of nearly everywhere I had been for a year, and I had never once opened the screen to check.