AgentComparison
Halo · product · on-device personal assistant for iPhone

Halo

An iPhone assistant that writes a daily briefing and runs automations, keeping data on the phone.

Group: Personal agents you message

Halo is an iPhone app that reads mail, calendar and reminders, writes a daily briefing and runs automations you describe in plain words. The vendor says its data stays on the device and that you bring your own AI provider (ChatGPT, Grok or Apple Intelligence); it also connects to other apps through the Model Context Protocol.

Documentation researched, not testedChecked 5 October 2026Vendor documentation, not a test

The decision in plain English

The vendor's site lists a one-time price of $49 (early bird, shown against $99) after a 7-day free trial, with no subscription, while the App Store listing shows a free download with a 'Halo Pro' in-app purchase at $49.99. You also supply your own AI provider access (ChatGPT, Grok or Apple Intelligence), so any cost your provider charges is separate from Halo's price. The vendor says it runs no servers; AI requests still go from your phone to the provider you pick.

Best fit

iPhone users who want a daily briefing across mail, calendar and reminders and who prefer an assistant that keeps data on the phone and uses their own AI account.

Poor fit

Anyone on Android or an older iPhone, or who wants a single price with the AI model included: you bring and pay for your own AI provider.

Documented capabilities

Vendor statements, not verified task outcomes.

  • Daily briefing across mail, calendar and reminders Source · checked 2026-10-05
  • Automations described in plain words, using the Model Context Protocol to reach other apps Source · checked 2026-10-05
  • Bring-your-own AI provider: ChatGPT, Grok or Apple Intelligence Source · checked 2026-10-05

Permissions and human control

  • The vendor says Halo reads sources already on your phone (mail, calendar, reminders) and connects to apps you choose through MCP. We did not find a published list of approval controls for the actions its automations take.

Documented controls do not prove that an agent always follows them.

Limits and open questions

  • iPhone only; the App Store listing requires iOS 26.0 or later
  • Health, Music and Notes sources are marked 'coming soon' on the vendor site
  • You supply your own AI provider; requests go to that provider under its own privacy policy
  • Vendor site and App Store show slightly different prices ($49 one-time versus $49.99 Halo Pro)
  • Described by the vendor; not tested by AgentComparison

Privacy and security

The vendor says Halo has no backend servers or accounts, stores data on your iPhone and, if iCloud is on, syncs it through your own iCloud account. AI requests go from the phone to the provider you configure, using your own key or subscription, under that provider's policy. The privacy policy also says it may collect anonymous crash and usage data. The homepage describes Halo as an assistant that 'never leaves your iPhone'; the policy and security page show that provider requests and iCloud sync do leave the device, so read both before connecting sensitive accounts.

Common questions about Halo

What is Halo for?

iPhone users who want a daily briefing across mail, calendar and reminders and who prefer an assistant that keeps data on the phone and uses their own AI account. The vendor describes it as: Halo is an iPhone app that reads mail, calendar and reminders, writes a daily briefing and runs automations you describe in plain words. The vendor says its data stays on the device and that you bring your own AI provider (ChatGPT, Grok or Apple Intelligence); it also connects to other apps through the Model Context Protocol.

Who should look elsewhere?

Anyone on Android or an older iPhone, or who wants a single price with the AI model included: you bring and pay for your own AI provider.

How much does Halo cost?

meethalo.app lists Halo Lifetime at $49 one-time (early bird, shown against $99) after a 7-day free trial; the App Store lists a free download with Halo Pro at $49.99 in-app.

What can it access and what needs my approval?

The vendor says Halo reads sources already on your phone (mail, calendar, reminders) and connects to apps you choose through MCP. We did not find a published list of approval controls for the actions its automations take.

What happens to my data?

The vendor says Halo has no backend servers or accounts, stores data on your iPhone and, if iCloud is on, syncs it through your own iCloud account. AI requests go from the phone to the provider you configure, using your own key or subscription, under that provider's policy. The privacy policy also says it may collect anonymous crash and usage data. The homepage describes Halo as an assistant that 'never leaves your iPhone'; the policy and security page show that provider requests and iCloud sync do leave the device, so read both before connecting sensitive accounts.

Has AgentComparison tested it?

No. This record is built from the vendor's own documentation, checked 2026-10-05. Vendor claims are attributed, not confirmed.

How to evaluate Halo yourself

  1. Pick one low-risk task that matches its documented capabilities: daily briefing across mail, calendar and reminders.
  2. Write the expected output and what counts as failure before you start.
  3. Connect the minimum access needed, and check approval settings first.
  4. Run it twice and compare, then review every action it took.
  5. Check cost after any free allowance. Unknown price is not free.

Related

Sources and history

Change history

Documentation overview expanded with current pricing/access sources. No hands-on results claimed.

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