BlockSite has the broadest platform coverage of any app researched for this comparison set: Chrome, Firefox, Edge and Safari extensions, plus native iOS, Android and desktop apps, all syncing together under one account. It's also a genuine content-control suite, not just a domain blocker — it supports keyword-based filtering, not only whole-site or whole-app blocking, which means it can catch distracting content even on sites you haven't explicitly listed by name. BlockSite's own privacy policy lists BlockSite LP as the registered entity, and the product has reportedly been in the market since around 2017, giving it a longer track record than several of the newer, more design-forward apps in this comparison set.
What BlockSite actually does
BlockSite maintains a blocklist of sites and apps, enforced across browser extension and native app installs, with scheduling and a built-in focus-timer mode layered on top for anyone who wants a Pomodoro-style rhythm alongside the block itself. Its keyword filtering can catch content based on what's in the text of a page, not just its domain name — a genuinely more granular approach than most blockers manage, useful for catching distracting content on otherwise legitimate sites. An optional password-protection feature adds friction to changing settings, though it comes with a real, openly acknowledged limitation worth understanding before relying on it. BlockSite's scheduling also supports multiple independent rule sets, similar in spirit to more configurable competitors, so a work-hours blocklist and a bedtime blocklist can run on entirely separate rules without one overwriting the other.
Where BlockSite is honestly the better pick
The sheer breadth of platform coverage — extension, mobile, desktop, all syncing together — is a real, practical advantage if your distraction problem spans a browser, a phone and a computer at once, since one blocklist genuinely follows you across every device rather than needing separate setup on each. Keyword-based filtering, catching content rather than just a domain name, is also a genuinely more sophisticated approach than a simple blocklist, and it's a feature most competitors in this comparison set simply don't offer at all. It's also worth noting that syncing one blocklist across a browser extension, a phone and a desktop app removes a real practical annoyance — maintaining four separate lists on four separate devices, which is exactly the kind of friction that causes people to quietly give up on a blocking habit altogether.
| Feature | BlockSite | Mr. Grummel |
|---|---|---|
| Platforms | Chrome, Firefox, Edge, Safari extensions, plus native iOS, Android and desktop apps, all synced | iOS & Android (in development) |
| Core mechanism | Blocklist and keyword filtering, enforced via browser extension and/or native apps, with scheduling | Answer a quiz question from the app's curriculum to unlock |
| Self-bypassable by uninstalling? | Yes — per BlockSite's own support documentation, its password protection "can't prevent uninstalling BlockSite," and every block ends the moment it's uninstalled | Not yet released — can't be assessed |
| Physical hardware required? | No | No |
| Price | Freemium; premium pricing varies by source and region — check blocksite.co directly for the current figure | Not yet announced — join the waiting list |
The one mechanical difference that actually matters
This is worth stating from BlockSite's own documentation rather than as a guess: password protection there raises the friction of changing settings, but explicitly can't stop the app from being uninstalled outright, and once it's gone, every block ends with it, no matter how strong the password was. Mr. Grummel's quiz question isn't trying to be an uninstall-proof lock either, but the comparison is really about breadth versus depth — BlockSite covers more surfaces (browser, phone, desktop) with a lighter individual defence on each, while Mr. Grummel covers one surface, the phone, with a single consistent mechanism that doesn't need to be separately configured anywhere else. It's also worth being clear that this isn't really a criticism unique to BlockSite — most software-only blockers share some version of this same uninstall-ends-everything limitation, and BlockSite at least documents its own honestly rather than implying a stronger guarantee than the product actually delivers.
Who should pick which
If your distraction problem spans a browser, a phone and a desktop computer, and you want one blocklist synced across all of them, BlockSite's breadth is doing something Mr. Grummel, as a phone-only app, doesn't attempt to match. If you want one focused mechanism specifically for your phone, and you're comfortable that the app itself is where the friction genuinely happens each time rather than depending on a password nobody can actually be stopped from bypassing by uninstalling, that's Mr. Grummel's narrower bet. It's also worth trying BlockSite specifically if keyword filtering matters to you, since catching distracting content by what's actually on the page, not just which domain it's hosted on, is a genuinely more thorough approach than most blocklists in this comparison set attempt. It's also worth remembering that breadth of platform coverage matters most if your distraction genuinely spans several devices — for a problem that's really just about your phone, that breadth may not be worth the trade-off against a more focused tool.