01 Why people go looking for this
Overwolf is a host platform for game overlays. Companion apps get built on it, and it handles the overlay drawing, the app store and the ad slots that pay the developers. It works, and a lot of good software runs on it.
It's also a second always-running program you didn't set out to install. Both the Porofessor and Mobalytics store pages say it outright: downloading the app installs the Overwolf client. For plenty of people that's fine. For everyone else it's why they end up searching for a way around it.
02 Which ones run standalone
Three of the five. Blitz is standalone and carries ads, with a $4.99 a month Premium tier to turn them off. OP.GG Desktop states on its own store page that it doesn't require the Overwolf client, and it's an 84 MB Electron build with ads. Warden is a native Windows app at 26 MB, no ads, no account. Porofessor and Mobalytics both bring Overwolf with them, which is where most of the difference shows up in Warden vs Porofessor.
| Warden | Overwolf apps | |
|---|---|---|
| Free to use | Yes | Yes |
| Ads in the free version | None | Yes, in the free tier |
| Paid tier to remove them | Not needed | Premium tier |
| Builds held back for paying users | None | Some features |
| Installs the Overwolf platform | No | Yes, installed with the app |
| Vendor-listed download | 26 MB | 2.5 MB to 26.9 MB installer |
| Champ select detection | Yes | Yes |
| One-click rune and item import | Yes, non-destructive | Yes |
| Mode-aware for ARAM and Arena | Yes, augments ranked | Yes |
| Account required | No | Optional |
| Platforms | Windows 10+ | Windows |
Figures come from each app's own store page or site, checked August 2026, and cover the champ select job: getting the right runes, items and augments in before the loading screen. Overwolf-hosted installers pull the Overwolf platform down with them, so the listed size is the installer rather than the finished footprint.
03 What skipping it actually gets you
A shorter list of things running while you play, one updater instead of two, and no ad slot in a window you opened to read six item icons. Overwolf isn't malware and it won't wreck your machine, but it is a second piece of software with its own update cycle sitting between you and a rune page.
Worth knowing: standalone doesn't automatically mean small. OP.GG runs standalone and still ships 84 MB, because Electron is a full browser engine wrapped around a web page. Warden is 26 MB of native Windows, and it's the only one of the five with no ads at all. Blitz asks $4.99 a month to switch its ads off, which is the short version of Warden vs Blitz.
04 Where the builds come from
Every night we pull the current patch from Data Dragon and CommunityDragon and rebuild the recommendations from match data, rather than reprinting someone else's tier list. Win rates get ranked on a Wilson lower bound, which is a long way of saying a 58% win rate over 40 games doesn't get to outrank a 53% over twelve thousand. The small-sample noise stops floating to the top, which matters most on the champions nobody plays.
Mode changes the model, not just the item list. Rift builds are role-aware, so mid Ahri and support Ahri don't get handed the same page. ARAM weights sustain and poke, because you can't go back. Arena ranks augments alongside the build, because the augment is usually what decides the round.
Warden itself is a native Windows app for League of Legends, which is why it's 26 MB and opens instantly instead of starting a browser engine to draw a list of item icons.
The honest take
If you came here looking for a League companion that doesn't drag a platform along with it, there are three, and only one of them is free of ads as well.
Warden is 26 MB, standalone, and installing it installs exactly one thing. For getting the right runes and items in before the loading screen, that's the whole job done and nothing else running.