If you are hoping for a leaderboard, we do not have one. The research we rely on does not include a head-to-head test of TikTok against Instagram against YouTube Shorts that measures which one is harder to put down.
What does exist is research on the features these apps share. That turns out to be a more useful answer, because it explains why switching apps rarely fixes anything.
Is TikTok the most addictive social media app?
We cannot say that with evidence, and anyone who states it as fact is guessing.
TikTok gets named most often because it is the best-known example of an endless feed of short vertical videos. But Instagram Reels and YouTube Shorts are built on the same idea, and the research we rely on is about the format, not the brand.
So the honest version is: the studies we have cannot separate TikTok from its close cousins.
What does the research say about short-form video?
The largest piece of evidence is a meta-analysis of 71 studies covering about 98,299 people. Heavier short-form video use was linked to poorer attention and, most strongly, poorer inhibitory control, which is the ability to stop yourself doing something. It was also linked to more stress and anxiety.
This is correlational. It shows an association, not proof that the videos cause the problems. People who already struggle to stop may also gravitate to the format.
Source: Nguyen et al. (2025), Psychological Bulletin.
Smaller studies point the same way. In one EEG study of 48 people, a higher short-video addiction tendency went with lower prefrontal theta during an attention task and lower self-control.
Source: Yan et al. (2024), Frontiers in Human Neuroscience.
None of this singles out one app. It describes the format, whichever logo is on it.
Why might the format be so hard to put down?
Three ingredients from general research on dopamine and reinforcement seem to map onto short-video feeds. That mapping is our own inference, not a finding from studies of feeds.
Unpredictable rewards. Dopamine neurons respond most to rewards that are uncertain. A feed where the next video might be great or might be nothing looks like that kind of reward.
Source: Fiorillo, Tobler & Schultz (2003), Science.
A schedule that keeps you responding. In Ferster and Skinner's classic work, variable-ratio schedules, where rewards arrive after an unpredictable number of responses, produced the highest and most persistent response rates. A swipe may be a very cheap response in this kind of schedule.
Source: Ferster & Skinner, Schedules of Reinforcement (1957).
Wanting without liking. Berridge and Robinson describe "wanting" and "liking" as separate brain systems, with dopamine driving wanting rather than liking. One reading is that this matches the familiar experience of scrolling for an hour without enjoying much of it.
Source: Berridge & Robinson (2016), American Psychologist.
Add one more observation of our own: an endless vertical feed has no natural stopping point. Nothing ends, so nothing prompts you to decide whether to continue.
Is TikTok more addictive than Instagram or YouTube Shorts?
The research we rely on does not answer this directly, so any ranking would be opinion.
The practical comparison is simpler. Ask which of them gives you an endless, algorithm-picked stream of short clips where the next one is a swipe away. If the answer is all three, they share the same format, and the one you personally find hardest to leave is the one to worry about.
It also depends on how you use each app. An app you open to message a friend behaves very differently from one you open to be fed.
Is social media more addictive than video games?
The research we rely on cannot answer that either. It does not compare social media with games, and the two work differently, so a single winner would be a made-up one.
What can be said is that "addictive" is carrying a lot of weight in that question. The pull of a feed may come from unpredictable rewards, no stopping point and almost zero effort per step. Whether a given game or a given app has more of those is a question about the specific product and the specific person.
Does a notification make it worse?
In an observational study of real-life smartphone use, about 89% of smartphone interactions were started by the user, not prompted by a notification. That figure covers smartphone use overall, not social or short-video apps specifically.
Source: Heitmayer & Lahlou (2021), Computers in Human Behavior.
So notifications may account for only a small share of smartphone interactions overall, and turning them off, the usual advice, may leave much of the reaching untouched.
Notifications still cost something. One study found social media notifications during a focus task caused a brief slowdown in processing, with the size of the effect tied to notification volume and checking habits rather than total screen time.
Source: Fournier et al., "Attention hijacked," Computers in Human Behavior.
So what should you do about it?
Stop trying to find the safest app and start looking at your own pattern. This is not a character flaw. Feeds like these can be hard to leave, and finding them hard to leave is common.
- Name the format, not the brand. If you delete TikTok and your thumb finds Reels, the problem moved with you. Look for any endless short-video feed.
- Notice which one you reach for most. That is the one to put a barrier in front of.
- Add friction where the reaching happens. Move it off your home screen, log out, or block it on a schedule. Make the first step slower than a thumb movement.
- Plan the gap. When the feed is blocked, the urge arrives with nothing to fill it. Decide in advance what you will do in that moment. One thing, not a list.
An app can help with the block and the gap. Boredom does that with a guided reset, but the phone's own screen-time settings can do the blocking for free.
The short version
We cannot honestly tell you which social app is the most addictive. The evidence we rely on is about short-form video as a format, and it links heavy use to poorer attention and weaker inhibitory control, though not as proven cause.
TikTok, Reels and Shorts share the format, so the useful question is not which one is worst. It is which one you reach for most, and what stands in the way of the next open.