Ask your AI
about your training.
Splyt is a workout tracker for iPhone and Apple Watch with its own connector for ChatGPT and Claude. Connect it once, then ask about your lifts, records, plan and sleep in plain words.
What it does
You log your workouts in Splyt: every set, every rep, the weight on the bar. Splyt also keeps your split, your planned days, your habits, and the steps, sleep and body weight it reads from Apple Health. The connector lets Claude or ChatGPT read all of that, so when you ask “am I getting stronger?” the answer comes from your own log instead of general advice.
It works through the Model Context Protocol (MCP), the standard both Claude and ChatGPT use for connectors. You don’t need to export a CSV or paste your history into a chat; the AI looks up what it needs when you ask.
What the AI can read
Eight read-only tools, all scoped to your own account:
- Training overview — This week: done, missed and planned, against last week.
- Workouts — Every workout in a date range, newest first.
- Workout details — One session in full: each exercise, each set.
- Exercise progress — One lift over time: top set, estimated 1RM, volume.
- Personal records — Your best lifts and estimated 1RMs, with dates.
- Training plan — Your split and the workouts planned for the coming days.
- Habits — Your active habits and how often you kept them.
- Daily health — Steps, sleep, active calories, body weight and water.
Weights come back in pounds, and dates are your own local days, so “this week” means your week.
Connect Splyt to Claude
Connector URL: https://splyt.fit/mcp
- In Claude, open Settings → Connectors and choose Add custom connector.
- Name it Splyt, paste the URL, and add it.
- Choose Connect, sign in with your Splyt account, then Allow.
Add it once on claude.ai or the desktop app. On Team and Enterprise plans an owner adds it first.
Connect Splyt to ChatGPT
ChatGPT has its own address: https://splyt.fit/mcp/chatgpt
- On chatgpt.com, open Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
- Choose Create, name it Splyt, paste the URL and keep OAuth.
- Sign in with your Splyt account, Allow, then pick Splyt from the + menu in a chat.
Custom connectors need a paid ChatGPT plan and the web app. OpenAI renames these menus often.
Signed up to Splyt with Apple? Your account uses a private relay address from Apple. When asked to sign in, choose to get a sign-in link by email and enter that address; you’ll find it in the app under Profile → Claude & ChatGPT.
Things to ask
Each of these is answered from your own data:
- “How has my bench press progressed this year?”
- “Summarise my training this week and tell me what to do next.”
- “Which muscle groups am I neglecting?”
- “Do I lift better after a good night of sleep?”
- “What PRs did I hit this month?”
- “What’s on my plan for the rest of the week?”
The AI combines the tools on its own. Ask whether you lift better after a good night’s sleep and it reads your sleep from daily health and your top sets from your workouts, then lines them up by day.
Privacy
Read-only. It can’t log, edit or delete anything, and it can’t see anyone else’s training.
You approve it. Nothing is shared until you sign in to Splyt and choose Allow. Sign-in uses OAuth, so your password never goes to the AI app.
Disconnect anytime. Remove Splyt in your AI app’s connector settings to stop access immediately.
What the AI app does with the answers is covered by its own privacy policy. Ours is at splyt.fit/privacy.
Questions
Which workout tracker connects to ChatGPT and Claude?
Splyt does. It has its own connector (an MCP server) at https://splyt.fit/mcp, so Claude and ChatGPT can read the workouts you log in the Splyt app on iPhone and Apple Watch and answer questions about them.
Can ChatGPT or Claude change my workouts?
No. All eight tools are read-only. The AI can read your workouts, records, plan, habits and daily health numbers, but it cannot log, edit or delete anything, and it can only see your own account.
Do I need an API key?
No. You sign in with your Splyt account through OAuth and choose Allow. There is no key to copy and nothing to install on your computer.
Does it work with the free version of ChatGPT?
Custom connectors in ChatGPT need a paid plan and the web app at chatgpt.com, with Developer mode turned on. Claude supports custom connectors on claude.ai and its desktop app.
How do I disconnect Splyt?
Remove Splyt in your AI app’s connector settings. That stops all access straight away, and you can add it back whenever you like.
Does it cost anything?
Splyt is free on the App Store, and connecting it to Claude or ChatGPT costs nothing extra.
Can I use it with Claude Code or another MCP app?
Yes. It is a standard remote MCP server (Streamable HTTP, OAuth 2.1). In Claude Code run "claude mcp add --transport http splyt https://splyt.fit/mcp". The full reference is at splyt.fit/developers.
Splyt is free on iPhone and Apple Watch. Get Splyt on the App Store · Developer reference · Free lifting tools · Every feature