"Storage Almost Full" usually arrives at the worst possible moment. Before you start deleting apps you like, it is worth spending two minutes finding out where the space actually went — because on most phones the answer is the same, and it is not apps.
First, look at the real numbers
- Open Settings.
- Tap General.
- Tap iPhone Storage.
Give it a few seconds to calculate. You get a bar chart by category and a list of apps sorted by size. On a phone that has been in use for a couple of years, Photos is almost always the largest single entry, often by a wide margin.
"Optimize iPhone Storage" is not deletion
If you use iCloud Photos, Settings → Photos → Optimize iPhone Storage replaces full-resolution originals on the device with smaller versions, keeping the originals in iCloud. This is genuinely useful and you should probably have it on.
But understand what it does and does not do:
- It frees space on the device.
- It frees nothing in iCloud — the originals are still there, still counted against your iCloud plan.
- It is not a cleanup. Every redundant burst frame and forgotten screenshot is still in your library, just smaller locally.
So if the message you are seeing is about iCloud storage rather than device storage, optimization will not help at all. You have to actually delete things.
Recently Deleted holds your space for 30 days
This catches almost everyone. Deleted photos move to Recently Deleted and stay there for 30 days, occupying storage the entire time. If you delete 8 GB and the number does not move, this is why.
- Photos → Albums → Recently Deleted, under Utilities.
- Unlock with Face ID, Touch ID or your passcode.
- Select → Delete All.
Only after this does the space come back.
What to delete first
Not all photos are equally worth reviewing. In order of best-space-returned-per-decision:
- Burst sequences. One press of the shutter can produce 40 near-identical full-resolution frames. Keeping one is almost always enough.
- Screenshots. Usually the largest count in a library and the lowest long-term value — a receipt, a map, a conversation you needed for an hour.
- Near-duplicates. Three or four attempts at the same shot. See our guide on deleting duplicate photos for what iOS catches on its own and what it does not.
- Blurry or failed shots. Zero value, full file size.
- Videos. Fewer items, but a single 4K minute is roughly 350 MB. Worth a separate pass by size.
Device space versus iCloud space
One distinction worth keeping straight, because it decides whether your effort pays off:
- iCloud Photos on: deleting a photo removes it from every device and frees the space in iCloud too. This is what you want if your iCloud plan is what is full.
- iCloud Photos off: deleting affects only the device in your hand.
- If a photo is stored only in iCloud (offloaded by optimization), deleting it frees a lot of iCloud space and only a thumbnail's worth on the device.
Where Flick fits
Flick exists because the deciding is the slow part, not the deleting. It groups your library into exact duplicates, bursts, screenshots, visually similar shots and probably-blurry ones, shows each photo full-screen one at a time, and tells you how much space each decision would return — including whether that space is on the device or in iCloud. Swipe right to keep, left to stage. Nothing is removed until you confirm a batch, and the analysis never leaves your device.
Flick is free to try on the App Store. Unlimited cleanup is a one-time purchase covering iPhone, iPad and Mac — no subscription.