Should I repair my iPhone screen or replace the phone?
Repair it if the phone is otherwise healthy — on an iPhone 11 or newer the screen is normally a fraction of a replacement handset and you keep your data, your apps and your number. Replace the phone when several expensive things have failed at once on an old model, or when the board itself is damaged.
The case for repairing
A new front assembly restores the phone to how it was, and nothing on it is touched — no reset, no migration, no lost photos or messages. The screen I fit carries a one-year warranty starting on the repair date, which changes the maths on keeping a two or three year old iPhone rather than replacing it.
A repaired iPhone is also worth noticeably more second-hand than a cracked one, so the repair often pays for part of itself if you do plan to sell.
When replacing is the honest answer
If a very old model needs a screen and a battery and a charging port, the total can approach the value of a good used handset. And if the phone has liquid damage on the board, a new screen fitted on top of corrosion just buys a few weeks.
In those cases I will tell you so. Selling someone a part for a phone that will not last is a bad trade for both of us.
The questions that settle it
How old is the phone, and does it still get iOS updates? A model that has fallen off Apple's update list is living on borrowed time whatever you spend on it. What else is wrong with it? One fault on a healthy phone is a repair; three faults on a tired phone is a pattern.
What would you actually buy instead, and what does that cost? Compare the repair against the real replacement you would choose, not against a new flagship you were never going to buy.
And what is on the phone that you would miss? For most people the deciding factor is not money — it is that a repair keeps everything exactly where it was, with no migration and no lost logins.