01 The short version
OP.GG Desktop is the desktop form of the site most players already check between games. It auto-sets runes and items, shows champion tiers and early lane tips, and its store page states it's standalone and doesn't need the Overwolf client. It also states it carries ads.
Warden overlaps almost exactly on the loadout features and differs underneath. It's a native Windows binary rather than a packaged browser, 26 MB against 84, and there's no ad slot.
02 Side by side
| Warden | OP.GG Desktop | |
|---|---|---|
| Free to use | Yes | Yes |
| Ads in the free version | None | Yes |
| Paid tier to remove them | Not needed | Not listed |
| Builds held back for paying users | None | None |
| Installs the Overwolf platform | No | No, standalone |
| Vendor-listed download | 26 MB | 84.0 MB Electron build |
| 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, for extra features |
| 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 comes with OP.GG Desktop
The website, in a window. It's the same data most players already check in a browser tab, with a rune import attached and champion tier lists alongside it.
It skips Overwolf, which is the one thing it and Warden agree on, and which puts both of them on the short list of companions that run standalone. What it doesn't skip is Electron: 84 MB of browser engine to draw a list of item icons, with ads in it.
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, 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
This is the closest comparison in the roundup of League companion apps, which makes the difference easy to see. Same job, same lock-in import, both free, both standalone.
Warden does it in 26 MB of native Windows instead of 84 MB of packaged browser, and with no ad in the window. Same result, a third of the weight, none of the noise.