Both promise the same thing: fewer hours lost to your phone. They work in very different ways, and which one fits depends on one question: do you want your whole phone to stop, or just the apps that pull you in?
What Downtime does
Downtime is part of Screen Time. You set it in Settings → Screen Time → Downtime, either on demand or on a schedule. During Downtime, only the apps you allow (plus calls) stay usable. Everything else is greyed out.
- It's all-or-nothing: you allow a short list, and everything else is blocked. Banking, maps and notes go dark along with TikTok, unless you add them.
- It's easy to skip: a blocked app shows Ignore Limit. Without a Screen Time passcode, that's one tap.
- The passcode helps, but it's yours: you can set a Screen Time passcode so you need it to get more time. If you know the passcode, you'll type it at 23:40.
- One schedule: Downtime has one window per day (you can vary it by day). No separate window for work hours and another for bedtime.
What an app blocker does
An app blocker, like ARCO, uses Apple's Screen Time framework too, but turns the logic around: you pick the few apps that steal your time, and only those get blocked.
- Targeted: Instagram, TikTok and YouTube are shut; everything else works.
- Several windows: work hours, study time and the hour before bed can each have their own times and days.
- Breaks on purpose: instead of "Ignore Limit", you get a set number of short breaks, after which the block comes back by itself.
- Strict when you need it: a strict focus session can't be ended early.
Side by side
App blocker: blocks only the apps you pick, several schedules, counted breaks, strict sessions, usually a subscription.
When Downtime is enough
- You want a calm phone at night and don't mind most apps being off.
- Someone else holds the Screen Time passcode (a parent, a partner).
- You rarely tap Ignore Limit.
When an app blocker works better
- You need your phone for work or study, just not the feeds.
- You want different rules for work hours and bedtime.
- You know the passcode, and you know you'll use it.
Many people use both: Sleep Focus and Downtime to quiet the night, and an app blocker to keep work hours clean. If App Limits keep failing you, read why Screen Time limits don't work.