LoL Overlays and Vanguard: Are Porofessor, Blitz and Mobalytics Safe?

Riot allows LoL overlays such as Porofessor, Blitz and Mobalytics alongside Vanguard as long as they work through its official APIs and don’t give you a measurable in-game advantage. Riot does not ban players for using an overlay. Since October 6, 2026, though, Vanguard blocks game-memory access for every unknown third-party app, and approved tools must move to the official APIs by April 2027.

Are LoL overlays allowed with Vanguard?

Yes, with conditions that Riot has written down. The Third Party Applications policy on Riot Support (last updated February 10, 2025) opens by saying that such apps “can be great for onboarding newer players, tracking your stats, finding like-minded teammates, hosting/playing tournaments”. What it forbids is anything that provides “a measurable player advantage”: exposing hidden information, automating actions, “drawing conclusions for you during gameplay”, “altering your field of intelligence (zoomhacks or global ult alerts)”, and unauthorized skin modifications.

So the line is not “overlay or no overlay”. A champion-select page that shows your opponents’ recent ranks is stat tracking. A box that pops up mid-fight and tells you the enemy Jinx has no Flash is drawing a conclusion for you. Same company might ship both features, and only one of them is a problem.

Riot also refuses to publish a whitelist. The same policy says plainly: “we can’t provide a full list of which ones are safe to use”, and adds that “if an application is approved and built using the official Riot API, players should rarely have an issue”. The responsibility sits with the developer to register the product, and with you to use tools that did.

What changed on October 6, 2026?

Riot closed the back door that many LoL overlays had been using for years. In a support post dated September 29, 2026, the company announced that it would “begin proactively preventing game memory access by default for all unknown third-party applications” across League of Legends, TFT and Valorant, starting October 6, 2026. Riot’s reason is blunt: “advances in AI-assisted reverse engineering have grown the ranks of would-be hackers”, and the memory access that powered legitimate tools “is now being increasingly abused by bad actors to create thousands of new cheats”.

The two groups get different treatment. Unknown apps lost memory access on day one. Known, currently approved tools got “an extended grace period until April 2027”, after which the official APIs become “the only allowed mechanism for retrieving game data”. Thing is, that grace period is the detail that matters for you right now: if your favourite overlay still works in November 2026, that doesn’t mean it is reading data the approved way, only that it is on the known list and has until spring to switch.

And the question everyone asks first. Will Riot ban you for using a third-party tool after this update? Riot’s answer, word for word: “No. This change does not result in bans by itself, it just blocks unauthorized tools from interacting with the game client.” The worst case for a legitimate overlay is that a feature stops working.

How does Vanguard treat overlays?

Sure, Vanguard runs at kernel level, but it is not an overlay police. Riot describes it as “custom game security software” made of “a client that runs while League of Legends is active and a kernel mode driver”, and it “must be running to use League of Legends” since the 2024 rollout. Its job is to stop cheats and the drivers they hide behind. When it blocks something, you see a Windows notification along the lines of “Vanguard has blocked something from loading on your machine”, and the Vanguard FAQ (updated June 2, 2026) notes that this usually points at a vulnerable or outdated driver, not at an app you installed on purpose.

Which brings up the practical difference between the two kinds of LoL overlays. A Discord or Nvidia overlay draws on top of the game window and reads nothing from League; Vanguard doesn’t care about it. A stats overlay that needs to know who is in your lobby either asks Riot’s API, which is fine, or digs through the game process, which is now blocked. Honestly, the second kind is what the October change was about, and Vanguard is the mechanism that enforces it.

If Vanguard throws an error code rather than a quiet block, that is a different problem; our Vanguard error codes guide covers VAN 1067, VAN 9001 and friends, and the VAN 57 fix is the one that most often involves a conflicting background app.

Which LoL overlays are considered safe?

Riot names none, so neither will we claim an official seal for any of them. So what counts as approved? Put simply, registration. Porofessor, Blitz, Mobalytics, U.GG’s app and OP.GG’s desktop app each describe themselves as registered Riot developer products, and registration means an audit, because the developer policies state that “all products must be registered in, and audited by Riot Games through the Developer Portal”. That is the closest thing to approval Riot offers.

What those policies forbid is more useful than any list. Products “cannot create an unfair advantage for players”, “cannot de-anonymize players who cannot reasonably be identified from visible information”, and cannot build “alternatives for official skill ranking systems”, a rule Riot spells out as “prohibited alternatives include MMR or ELO calculators”. So a champion-select overlay that shows a public rank is within the rules; one that tells you a hidden MMR number is not, and our piece on Valorant tracker sites explains why the same limit applies there.

A short checklist before you trust a LoL overlay with your account:

• Does the developer say the app is registered with Riot and uses the Riot API? If the website avoids the question, that is your answer.
• Does any feature work during a live game with information you couldn’t see yourself (enemy cooldowns you never saw cast, hidden MMR, auto-ping on jungle timers)? Then it fails Riot’s “drawing conclusions for you” test.
• Does it ask for your Riot password? Legitimate tools never do; they read the local client or the public API.
• Does it modify game files or inject into the game process? Skin changers and “FPS unlockers” that patch the client are exactly the category Vanguard exists to stop.

Do overlays hurt FPS in League?

Sometimes, and Riot says so in its own troubleshooting article. Does a Discord overlay really cost frames? It can. The Disabling Overlays page (May 20, 2026) lists nine overlays it recommends turning off when you have performance or crash problems: AMD Radeon ReLive, Discord, Nvidia ShadowPlay, Overwolf, Razer Synapse Stats, Razer Cortex Gamecaster, Xbox Game DVR, Twitch and Plays TV. The wording is careful (“sometimes they do the opposite of that, eating up bandwidth or introducing compatibility problems with certain programs”), and so is the warning that “programs with overlays often auto-enable their overlay every time there’s an update”.

Real talk: Overwolf hosts a large share of the stats overlays, so if your frame rate drops the moment the loading screen appears, disable the Overwolf overlay first and only then start blaming League. Our best LoL settings guide covers the in-game side of that fight, frame cap, shadows and HUD scale, which is worth a look once you’ve sorted the overlays.

Can you get banned for an overlay in League?

Not for a normal stats overlay. Riot’s policy only takes issue with applications that “impede the competitive nature” of its games or break its terms, and the memory-access change explicitly “does not result in bans by itself”. Accounts get banned for scripts, bots, skin changers and anything that automates or sees what a human at the keyboard couldn’t. An overlay that shows the enemy support’s win rate on Thresh is nowhere near that line.

What does happen is a different story: a “free” overlay that is really a credential stealer, or a skin tool bundled with a script. Both sit squarely in the categories Riot’s policy names, unauthorized skin modifications and automated actions, and both end in a permanent ban. For what it’s worth, our 30-day warranty on LoL accounts does not cover that: it covers bans tied to the account’s purchase or its leveling history, not cheats or scripts installed afterward. Look, the overlay itself was never the problem in those cases.

What should you do with your LoL overlays now?

Three things, in order. Update every overlay you use, because the developers who matter shipped API-based versions around the October 6 change and the old builds simply stop showing live data. Turn off the overlay module of anything you only use for recording or voice when you play ranked, since those are the ones Riot’s performance article points at. And if a tool offers a feature that feels too good (enemy summoner spell timers it never saw, a hidden rank, auto-dodge), treat that feature as the reason the whole app might fall outside the rules after April 2027, when LoL overlays that still rely on memory access lose it for good.

FAQ

Are LoL overlays allowed?

Yes. Riot permits third-party apps for stats, onboarding, finding teammates and tournaments, as long as they provide no measurable in-game advantage and are built on the official Riot API.

Does Vanguard ban you for using Porofessor or Blitz?

No. Riot states that blocking unauthorized tools “does not result in bans by itself”. Bans are for cheats, scripts, bots and skin changers, not for stats overlays.

What happened to third-party apps on October 6, 2026?

Riot started blocking game-memory access for all unknown third-party applications in League, TFT and Valorant. Approved tools keep access until April 2027, after which only the official APIs are allowed.

Which overlays does Riot say to disable for FPS problems?

AMD Radeon ReLive, Discord, Nvidia ShadowPlay, Overwolf, Razer Synapse Stats, Razer Cortex Gamecaster, Xbox Game DVR, Twitch and Plays TV, per Riot’s Disabling Overlays article.

Is there an official list of approved LoL overlays?

No. Riot says it “can’t provide a full list of which ones are safe to use” and instead requires developers to register and be audited through the Developer Portal.

Can an overlay show hidden MMR?

Not within Riot’s rules. The developer policies prohibit “alternatives for official skill ranking systems” and name MMR or ELO calculators as an example, so a compliant overlay shows only visible ranks.