WhyLowDPS Download

Make your next WoW decision with confidence.

Run local simulations, compare gear and talents, and plan Mythic+ routes with clear evidence.

Get started Explore features
WhyLowDPS dashboard with tracked characters, vault progress, simulation activity, and system status.
SimulationsTest builds, talents, and gear with accurate, local sims.
Gear upgradesCompare items and find your next upgrade.
Dungeon routesPlan and simulate Mythic+ routes with real data.
Private hostingRun it locally or on your own server.

Everything you need to plan your next step.

Compare gear, test different setups, and see the real impact on your performance. Find the best upgrades for your character with clear, data-driven results.

Top Gear results ranked by DPS with selected item and talent combinations.

What changed?

Run local sims, follow active jobs, and inspect timelines, breakdowns, profiles, and history.

  • Quick Sim and saved SimC profiles
  • Simulation history and result analysis
  • Stat weights, plots, and action context

What should I equip?

Compare realistic combinations before spending gold, crests, or time on a guess.

  • Top Gear and upgrade comparisons
  • Drop, trinket, tier, and consumable planning
  • Character-specific wishlists

What should I do next?

Carry the season and content you play into the plan that leads to your next run.

  • Dungeon, raid, and encounter references
  • Saved route-specific simulations
  • Great Vault and weekly progress context

From a question to a confident upgrade.

Three parts of the same loop, connected by the character you are trying to improve.

01 · Simulate and inspect

Understand more than the final number.

Run SimulationCraft locally, watch the job progress, and review the actions and stats behind the result while keeping the setup that produced it.

Start with a local sim
Simulation timeline showing casts, actions, and damage events.
Inspect the actions behind each result.

02 · Compare and prioritize

Attach the delta to the decision.

Test gear, talents, trinkets, consumables, and upgrade paths before you commit to the option that only looked better at a glance.

Choose a deployment path
Top Gear results ranked by DPS with selected item and talent combinations.
Rank real combinations, not isolated item levels.

03 · Plan in context

Bring the content you play into the sim.

Save route-aware setups, browse current encounters, and keep weekly progress close to the character it belongs to.

Learn about trusted-LAN access
Dungeon route planner showing pulls, route health, timer, and SimulationCraft actions.
Build simulations around the route you will play.

One product, three ways to use it.

Keep the workflow local on Windows, host a private instance, or share the desktop app with a phone on the same trusted network.

Docker host + PWA

Private deployment

Run a private, single-instance web deployment with the app, backend, and Linux SimulationCraft runtime packaged together.

  • Multi-architecture Docker image with persistent data
  • Installable PWA with update guidance
  • Separate user data and administrator access controls

Desktop + phone

Trusted network

Pair a phone from Desktop Settings with a one-time QR or link, using the current desktop session over your private LAN.

  • Opt-in pairing with device management
  • Access cleared when the desktop restarts
  • No internet exposure or port forwarding

Your character workflow, remembered.

Simulation

Run locally, follow active jobs, and keep every result available for comparison.

  • Quick Sim
  • Top Gear
  • Live tracking
  • History

Upgrade planning

Compare realistic paths before committing currency or farming time.

  • Drop Finder
  • Crest Upgrades
  • Trinkets
  • Tier Matrix

Analysis

Go beyond a total and inspect how stats, actions, and choices affect it.

  • Quick Weights
  • Stat Plot
  • Consumables
  • Breakdowns

Character tools

Keep builds, goals, weekly progress, and account context together.

  • Saved SimC
  • Great Vault
  • Wishlists
  • Talents

PvE planning

Bring current content and the route you intend to play into preparation.

  • Dungeons
  • Raids
  • Affixes
  • Saved routes

Current by design

Season and SimulationCraft refreshes validate staged data and retain a last-known-good fallback.

  • Season rollovers
  • Runtime updates
  • Data validation
  • Safe recovery

Know where your data lives.

In the Windows app, credentials, profiles, routes, history, and simulations stay on your machine. Light Mode lets you use supported local workflows without connecting an account.

A private hosted instance keeps each allowed Battle.net user’s data separate on the operator-controlled server. Hosted administrators can allow users, assign administrators, disable access, and revoke active sessions.

Network requests are used for Blizzard game data, GitHub releases and published updates, and documented external data sources. WhyLowDPS is independent and is not affiliated with Blizzard Entertainment, SimulationCraft, or Raidbots.

Answers before you choose a setup.

Do I need a Battle.net API key?

No. Light Mode supports manual SimC, local analysis, history, upgrade planning, and content-reference workflows without credentials.

What does connecting Battle.net add?

Connected Mode adds account-aware character context such as rosters, saved characters, Great Vault data, wishlists, and talent tools.

Can I run WhyLowDPS as a private web app?

Yes. The release Docker deployment packages the web app, backend, and Linux SimulationCraft runtime for private single-instance hosting. for the deployment steps and callback rules.

Can I install the hosted app on my phone?

Yes. The hosted web app can be installed as a PWA when the deployment uses trusted HTTPS. The desktop app can also pair phones directly over a trusted private LAN.

Does WhyLowDPS run simulations locally?

The Windows desktop app runs SimulationCraft locally on your machine. A Docker-hosted deployment runs its own Linux SimulationCraft runtime on the private host.

Is WhyLowDPS affiliated with Blizzard or Raidbots?

No. WhyLowDPS is an independent project and is not affiliated with Blizzard Entertainment, SimulationCraft, or Raidbots.

Start with the workflow that fits your setup.

Download the Windows app, or bring WhyLowDPS to a private host and keep the full context close to your characters.

Download for Windows View setup options

Open source on GitHub · actively maintained · support via Discord

Windows desktop: install and choose your first mode.

  1. Download the latest completed Windows x64 release.Use the official GitHub release page and verify its checksum if you want to validate the installer.
  2. Choose Light Mode or connect Battle.net.Light Mode supports manual SimC, local analysis, history, upgrade planning, and shared catalogs. Connected Mode adds rosters, saved characters, Great Vault data, wishlists, and account-aware tools.
  3. Let the app prepare its data and runtime.Review simulation settings, then start with a small Quick Sim before a larger matrix or route simulation.
Battle.net callback

For the installed app, register http://localhost:17384/api/auth/bnet/callback in the Battle.net Developer Portal. Use the value labeled Client ID, not the management identifier in the portal URL.

Private Docker: run your own instance.

  1. Use an amd64 or ARM64 Linux host or Docker Desktop with WSL2.Current releases publish native application images and SimulationCraft runtimes for both architectures.
  2. Use the latest image and configure the host.The standard Compose file follows ghcr.io/josephlteif/whylowdps:latest. Set the private host IP, client-facing port, unique JWT secret, session encryption key, and bootstrap administrator BattleTag. Keep the persistent whylowdps-data volume and secrets backed up.
  3. Pull and start with the environment file.Use docker compose --env-file .env.docker pull, then docker compose --env-file .env.docker up -d. Open the host address from the trusted LAN and add other allowed users from Manage Users.
Hosted OAuth and updates

Register the exact browser-facing callback: http://<HOST-IP>:<PORT>/api/auth/bnet/callback, or https://<HOSTNAME>/api/auth/bnet/callback behind trusted HTTPS. The scheme, hostname, port, and path must match.

The standard Compose file follows :latest. Configure Portainer or another Docker manager to pull and recreate the service when the image digest changes. For rollback, replace the Compose image with an exact version or digest; docker compose restart app does not apply either change.

The PWA requires browser-trusted HTTPS. Direct LAN HTTP stays private but does not provide a secure browser context for native installation.

Trusted LAN: pair a phone without exposing the app.

  1. Put the PC and phone on the same trusted private network.Use a Windows Private network profile. Allow TCP port 17384 on the Private network only; never create a Public-network rule or port-forward it.
  2. Enable Share over LAN in Desktop Settings.Open Settings > Simulation, enable Share this app over LAN, and restart WhyLowDPS when prompted.
  3. Create and consume a one-time pairing link.Select New pairing link, scan the QR within five minutes, and choose Continue in Safari, Chrome, or another full browser if the scanner opens an embedded preview.
Access lifecycle

Keep the desktop app running while the phone is connected. Browser access expires after 24 hours; New link restores a device, Rename identifies it, and Remove access immediately returns it to the QR pairing screen.

Desktop LAN sharing is separate from Docker hosting. It uses the current desktop session and does not provide internet-facing access.