Since you're using an iPhone, building around Apple Home (HomeKit) is a great choice. It tends to be the most seamless experience for Apple users, especially if you already have an iPad, HomePod, or Apple TV.
I'd prioritize devices in this order:
1. A Home Hub (first purchase if you don't already have one)
A home hub enables automations and remote access when you're away.
Choose one of:
- HomePod mini (my top recommendation for most people)
- Apple TV 4K (if you also want a streaming box)
Either will act as your Home hub.
2. Smart lighting
Lighting gives you the biggest day-to-day improvement.
There are two approaches:
- Smart bulbs if you want color-changing lights and don't mind leaving the wall switch on.
- Smart switches if you want the lights to behave normally for everyone in the house.
If you own your home, smart switches are often the better long-term investment because guests can still use the wall switch normally.
3. Smart thermostat
If your HVAC system is compatible, a HomeKit-compatible thermostat is one of the most useful upgrades.
It can:
- Automatically adjust when everyone leaves.
- Resume your preferred temperature before you get home.
- Let you control heating and cooling from the Home app or Siri.
4. Security camera or video doorbell
Look for cameras that support HomeKit Secure Video.
Benefits include:
- End-to-end encrypted recordings.
- Person, pet, and package detection (depending on your plan and hardware).
- Viewing everything directly in the Home app.
5. Smart lock (later)
Once you're comfortable with the basics, a smart lock works especially well with HomeKit automations.
For example:
- Unlock the door → hallway lights turn on.
- Lock the door at night → downstairs lights switch off and cameras arm.
A simple starter setup
If I were aiming for the best balance of simplicity and value, I'd build this:
- Home hub: HomePod mini
- Lighting: 2–4 smart bulbs or a few smart switches in your most-used rooms
- Climate: One HomeKit-compatible thermostat
- Security: One HomeKit Secure Video camera
That setup is enough to create automations like:
- "Good Morning" → bedroom lights on, thermostat warms up.
- "Good Night" → all lights off, doors checked, camera armed.
- "Leaving Home" → lights off, thermostat set to Eco mode, camera starts recording.
- "I'm Home" → entryway lights on after sunset.
One final recommendation: when shopping, prioritize devices that support both HomeKit and the Matter standard. They'll work well with Apple today while giving you flexibility if you ever add devices from other ecosystems in the future.