# `Appsignal.CheckIn`
[🔗](https://github.com/appsignal/appsignal-elixir/blob/v2.17.0/lib/appsignal/check_in/check_in.ex#L1)

# `cron`

```elixir
@spec cron(String.t()) :: :ok
```

# `cron`

```elixir
@spec cron(String.t(), (-> out)) :: out when out: var
```

# `heartbeat`

```elixir
@spec heartbeat(String.t()) :: :ok
```

# `heartbeat`

```elixir
@spec heartbeat(String.t(), [{:continuous, boolean()}]) :: :ok
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*