There are two ways on iPhone. Free: use Apple's Screen Time to keep TikTok closed during your study hours, and have someone else set the Screen Time passcode. This blocks TikTok by the clock, but it can't tell whether you actually studied. To make TikTok open only after you've studied, you need a third-party app. Toll: Study to Unlock Apps, which we make, unlocks a gated app after a set number of minutes (15 or more) in a study app you choose, such as Anki or Duolingo, or after a round of questions from your notes. Toll is in App Store review and can't be downloaded yet. one sec has a similar option through its LENGO vocabulary integration.
Disclosure: we make Toll. Apple's steps come from Apple Support (iOS 27). one sec's features come from its App Store listing. Both checked November 8, 2026.
The free way: Apple Screen Time
Screen Time is built into iOS, and in iOS 27 it has two parts that matter here (Apple Support):
- Screen Time Schedule. Go to Settings › Screen Time › Screen Time Schedule and turn on Schedule. Create time windows (say, weekdays 4 to 8 pm for homework) and choose which Time Allowance categories are available in each.
- Time Allowances. Set how long you can use a category of apps (Apple's examples are Entertainment, Games and Social Media). Apple says that if an app declares a website, the allowance covers that website too, so you can't simply switch to TikTok in Safari. To check which category TikTok falls under on your phone, tap Manage Categories, then a category, to see the apps in it.
Then lock it. Settings › Screen Time › Passcode & Management › Lock Screen Time Settings sets a four-digit passcode you need before you can change those settings (Apple Support). If you'll just type it in yourself, let a friend or parent choose it.
What the free way can't do: it knows the time, not whether you studied. TikTok opens when the schedule says so, whether or not you did the reading.
The "study first" way with Toll
Toll uses Apple's Screen Time frameworks to put a gate in front of the apps you pick. Here's how you'd set it up for TikTok:
- Gate TikTok (and anything else that pulls you in) in Toll's app picker.
- Choose the toll. Pick a study-time toll (your study app, such as Anki, Duolingo or Hello Interview, plus a goal of 15 minutes or more) or a question toll (a round of questions from arithmetic or your own deck).
- Set the window. After you pay the toll, TikTok opens for 15, 30 or 60 minutes. Then the gate comes back on its own.
- Optional: toll hours. Enforce only on weekdays nine to five, evenings, or overnight. Outside those hours everything opens freely.
Your own decks, the study-time toll, multiple choice and toll hours need Toll Pro: $2.99/week, $3.99/month, $29.99/year with a free first week, or $49.99 once. The free version gates up to 2 apps with arithmetic questions. That still slows you down, but it isn't studying. Toll needs iOS 27 and works on iPhone only.
Why 15 minutes? Apple sets a 15-minute minimum for the usage tracking Toll relies on, so the study-time toll can't be shorter. If you want a quicker toll, a 3-question round takes about a minute.
Can Toll see what you do in TikTok or your study app? No. Screen Time hands apps opaque tokens, not app names. Toll only gets a signal when your study app reaches the time you set.
Other options
- one sec pauses you before TikTok. Its listing mentions a LENGO integration to "learn vocabulary to unlock social media" and a Re-Intervention that kicks you out after a set time. It's free for one app and runs on iPhone, iPad and Mac.
- Opal is for hard blocks during set hours. Its listing says its Deep Focus mode "won't let you cancel or bypass at all", which is stricter than Toll.
- Delete TikTok for exam week. It's free, it works, and you can reinstall it afterwards.
Be honest with yourself about loopholes
Every one of these can be undone: you can delete Toll, change a passcode you know, or use another device. Toll is a nudge for people who want one, not a parental control. If you want something you truly can't get around, a passcode held by someone else is stronger than any app you control.
Sources
- Apple Support: Set Screen Time Schedules and Time Allowances on iPhone; Create, change, or remove a Screen Time passcode (iOS 27, checked November 8, 2026).
- one sec on the App Store: apps.apple.com/us/app/id1532875441; Opal on the App Store: apps.apple.com/us/app/id1497465230 (both checked November 8, 2026).
- Toll's features and prices: the Toll page.