Waycar vs Happy

What Happy is

Happy (also called Happy Coder) is made by Happy Engineering. It is a free app for starting, steering and approving coding agent sessions from a phone. It runs on iPhone, iPad, Android and the web, with a desktop app for macOS, Windows and Linux.

The product has changed. The maker now describes Happy as a desktop “harness”, which means an app with its own agent runtime. Happy Desktop and the Happy Agent daemon run Claude, Codex and Grok themselves, and the phone app is one client for them. The original Happy CLI wraps the claude and codex commands in your terminal. Its docs say it is in maintenance mode.

Happy is free and MIT licensed. Voice is the only paid feature.

Where the agent runs, and how your phone reaches it

The agent runs on your own machine, or on a server where you install Happy Agent. Nothing runs on the phone. You install Happy Desktop on the machine, or run the original CLI with Node 20 or newer.

Your phone does not connect to that machine directly. It goes through Happy’s relay. The docs say devices hold the keys, and the relay stores opaque blobs. It sees that sessions exist and when they were active, not what is in them. On accounts its sources differ: the App Store says to create one in the app, and one docs page says there is no hosted account. We claim neither.

Waycar takes the other path. Your phone talks straight to your machine over mosh or SSH, and there is no Waycar account. Waycar has an optional push relay. Your machine encrypts each notification first, so the relay cannot read what it says. The relay does see your Apple push token, your machine’s IP address and request timing, and, for Live Activities, how many agents are working, blocked, done or idle.

The machine must be on and awake for Waycar, and it needs herdr 0.7.5 or newer or tmux 3.2 or newer. We did not find in Happy’s docs whether it can attach to a tmux pane you started yourself.

What Waycar adds to Happy

In Waycar the agent runs on your machine, in herdr or tmux, not in the app. Waycar starts, shows and steers it.

• One list, sorted by who needs you. The Console shows agents from all your machines as Blocked, Done, Working or Idle. Per its source code, Happy’s list marks sessions as working, blocked or unread. We did not find sorting in its docs.
• Agents you started yourself. Open Waycar and pick up what already runs in herdr or tmux. The agent keeps going when your phone drops off. We did not find in Happy’s docs whether it can do this.
• A Live Activity. Waycar puts agent status on the Lock Screen. We did not find a Live Activity in Happy’s docs. Both apps send a push when an agent needs you.
• A terminal over mosh. Waycar opens the agent’s terminal over mosh and falls back to SSH on its own. mosh keeps going while the app is open and catches up after dead zones. Happy’s phone app is a chat client.

Where Happy is better

• Price and license. The app, the CLI, the desktop app and the relay server are MIT licensed. You can read the code and host your own server. Waycar’s app is closed source, and its free tier has a 10 Launch limit.
• More platforms. Happy runs on Android, the web and desktop. Waycar is an iPhone and iPad app with no native desktop or web client. An Android app is coming soon.
• Its own agent runtime. Happy Agent runs the agent itself, with subagents on any model, agents that message each other, scheduled messages and persistent bots. In Waycar the agent runs on your machine in herdr or tmux, and Waycar starts, shows and steers it.
• Sessions that outlive your laptop. The daemon keeps sessions running when you quit Desktop. On a server, work goes on while your laptop sleeps. A Waycar machine must stay on and awake.

What each costs

Happy is free. The app, desktop app and original CLI cost $0, and models run on your own subscriptions or API keys. Voice gets 20 free minutes per 30 days. A subscription raises that to 5 hours. Its voice page does not state the price. The App Store lists one in-app purchase, Plus Monthly at $19.99, but its pages do not say that is the voice plan.

Waycar is free for up to 10 Launches in any rolling 30 days, with every feature included. A Launch is starting a new agent or shell from Waycar, resuming a closed agent, or starting an agent by typing its command in a Waycar shell. Opening and watching agents that already run never counts. Waycar Pro removes the limit for $5 a month or $40 a year (US).

Can you use both?

Yes. They do different jobs. Use Happy for a free, open source app with Android and a desktop app. Use Waycar when your agents already live in herdr or tmux and you want a direct path, with no account.