Diablo 4 companion apps

Blizzard’s BlizzCon 2026 update clarified what Diablo 4 season 10 will and will not include, and the community’s answer landed inside a day: the game still needs more UI than it ships with. Item filters, build planners, drop trackers, aspect codex checkers, none of them live in the client. The best apps for Diablo 4 companion tools cover build planning, item filtering, and event tracking on desktop, and stay legal about it. We picked eight that either read the game’s own tooltips or run entirely on public data.

What to look for

Six things separate a useful companion from an also-ran.

Quick comparison table

App Best for Runtime Free plan Standout feature
D4 Companion Aspect and item filtering overlay Native (Windows) Free (open source) Screen OCR without hooking the game
Maxroll Planner Detailed build planning Web Free Community-maintained meta builds
Icy Veins Season guides and rotations Web Free Text-heavy for readers
MobaLytics D4 Overlay guides in-client Overwolf overlay Free (with ads) Tips as the fight happens
Battle.net Official launch and social Native Free Required for game launch
Overwolf Diablo Tracker Event and drop tracking Overwolf overlay Free (with ads) Twitch Drops handoff
D4Builds.gg Sharing player builds Web Free Simple URL sharing
TrackObs Diablo Session logging and stats Native Free (open source) Reads chat log for events

The apps

1. D4 Companion, best filtering overlay

D4 Companion by josdemmers reads the game’s tooltip text through screen OCR and highlights items that match a filter you configured. Aspect codex tracker shows which Legendary aspects you still need, and the “wanted item” filter alerts on high-item-power drops. Runs as a native Windows app, never touches game memory, and is explicitly designed to be within Blizzard’s rules.

Where it falls short: OCR needs the game running at a stable resolution. Any UI-scale change requires recalibrating the overlay.

Pricing:

Platforms: Windows

Download: github.com/josdemmers/Diablo4Companion

Bottom line: The community-standard filtering tool. Install this before anything else.

2. Maxroll Planner, best build planner

Maxroll hosts the deepest build planner for Diablo 4. Every skill, aspect, gem, and paragon node is mapped, and the meta guides for each season are updated within days of a patch. Sharing a build is a URL; importing is a click.

Where it falls short: Meta chase. Guides update fast and any build you saved three weeks ago may already be behind the current tuning.

Pricing:

Platforms: Web

Download: maxroll.gg/d4

Bottom line: Where every serious build lives. Bookmark it before season 10.

3. Icy Veins, best text-first guides

Icy Veins has been publishing ARPG guides since Diablo 3. Their Diablo 4 section leans text-heavy: full explanations of why each aspect is chosen, ability rotations, and gear-swap timings. Better for readers than for skimmers.

Where it falls short: UI has not modernized alongside Maxroll’s. Navigation is functional, not fast.

Pricing:

Platforms: Web

Download: icy-veins.com/d4

Bottom line: Reach for Icy Veins when Maxroll’s structured guide leaves questions unanswered.

4. MobaLytics D4, best in-client overlay

MobaLytics D4 ships an Overwolf overlay that shows the guide you are following inside the game window. Tips appear during boss fights, and rotation prompts light up in the bar. Best for players who want to learn a build while playing rather than pausing to alt-tab.

Where it falls short: Overwolf’s ads run inside the overlay. Whitelist it in your firewall or pay for Overwolf Pro.

Pricing:

Platforms: Windows

Download: mobalytics.gg/diablo-4

Bottom line: Use it for the first week on a new build. Retire it once the rotation is in muscle memory.

5. Battle.net, best official baseline

Battle.net is not optional, it is what launches the game. Recent updates added a friends-in-game panel, party invitations from the launcher, and an activity feed. Not a companion tool in the traditional sense, but the desktop notification path for game invites and season resets.

Where it falls short: Not customisable. Notifications from Battle.net cannot be routed to a third-party push service without hacks.

Pricing:

Platforms: Windows, macOS

Download: battle.net

Bottom line: Runs whether you want it to or not. Might as well use the friends panel.

6. Overwolf Diablo Tracker, best event tracker

Overwolf’s Diablo IV Tracker overlays event timers (helltide, world boss, legion event) on the game screen. During Twitch Drops campaigns it also mirrors the drop-progress panel so you know a stream is credited without alt-tabbing.

Where it falls short: Same Overwolf ad model as MobaLytics. Some players find the overlay stack heavy.

Pricing:

Platforms: Windows

Download: overwolf.com/app/tracker_network-diablo

Bottom line: Best fit during Twitch Drops season. Otherwise a countdown timer in a spreadsheet does the same job.

7. D4Builds.gg, best community builds

D4Builds.gg hosts a lighter, faster planner than Maxroll and is where a lot of streamers publish first. Builds are shareable by URL, forkable, and versioned so you can see what changed after a patch.

Where it falls short: Meta guides are thinner. Reach for Maxroll or Icy Veins for the narrative around a build.

Pricing:

Platforms: Web

Download: d4builds.gg

Bottom line: Great secondary planner. First stop when a streamer says “the link is on d4builds”.

8. TrackObs Diablo, best for session stats

TrackObs Diablo reads the game’s chat log for pickup and death events and writes a session summary at the end. Not an overlay, not a build tool, just a quiet log of how the two hours went. Useful for anyone tracking farming efficiency across builds.

Where it falls short: No pretty dashboards. The output is a CSV and a text log. Import it into your own tooling if you want charts.

Pricing:

Platforms: Windows

Download: github.com/trackobs/diablo (search TrackObs Diablo)

Bottom line: For the player who logs everything. Skip if you just want to farm and log off.

How to pick the right one

Pick D4 Companion if you install nothing else. Item filtering saves more time than every other tool combined.

Pick Maxroll Planner for the season’s meta builds and share links.

Pick Icy Veins when Maxroll’s guide raises questions and you want a longer text explanation.

Pick MobaLytics for in-client help while learning a build.

Pick Battle.net for what it always was: game launcher, friends, invites.

Pick Overwolf Diablo Tracker during a Twitch Drops or event window, or for helltide timers on the overlay.

Pick D4Builds.gg for a faster build planner and streamer builds.

Pick TrackObs when you want a per-session stats log to reason about farm efficiency.

FAQ

Do these apps get me banned? D4 Companion, Maxroll, Icy Veins, D4Builds, and Battle.net are within Blizzard’s rules because they either use official APIs or read screen pixels only. Anything that hooks the game memory is a ban risk. The tools on this list do not.

Do I need Overwolf? Only if you want the in-client overlays from MobaLytics or Overwolf Diablo Tracker. Everything else on this list runs standalone.

How do I import a Maxroll build in-game? The game does not import from URLs. You match the build manually. Companion tools like D4 Companion track the aspects you have collected so you know what is still missing.

Can I run these on a Mac? Maxroll, Icy Veins, D4Builds are web-only and work anywhere. Battle.net is native on Mac. D4 Companion and Overwolf are Windows-only. Diablo 4 itself is Windows-only, so Mac usage means running the game via a compatibility layer, which the overlays generally cannot follow.

Is there a mobile Diablo 4 companion? Blizzard’s official Diablo IV Companion app on Android and iOS handles bounties, friends, and world event alerts. It complements the desktop tools rather than replacing them.