iPhone Duo stock trackers compared
Duo Watch ·
The right iPhone Duo tracker depends on how quickly you need alerts, whether you want an account, and whether you use an AI agent. This comparison describes published features, not a measured speed or accuracy benchmark. It is published by Duo Watch, one of the tools compared.
| Tool | Published approach | What to consider |
|---|---|---|
| Duo Watch | Free browser alerts without an account; country, store, color and storage filters; open MCP and JSON interfaces. | About a 10-minute target check interval, plus up to 10 minutes of source cache age. A full sweep can take longer. It may miss short stock windows. |
| InStock Radar | A US stock page with store/configuration availability, recorded restocks and paid alert options. | Its site advertises faster monitoring for paid alerts. Check current plans and supported regions before choosing. |
| Store Stock Checker | Free stock checking with account-based paid alerts for selected stores and configurations. | Its site lists alerts from $5 per month at the time of review. Confirm the current plan, store limit and delivery methods. |
| Orion Chime | Nearby Apple Store checking and account-based restock alerts by color, storage and store. | Its guide requires sign-in and email verification for alerts. Notification timing and available channels depend on plan. |
If you want a simple free alert
Duo Watch is an option if you are comfortable with its check interval and want browser notifications without creating an account. On iPhone, you must add it to your Home Screen before enabling Web Push. The setup guide walks through the steps.
If very short stock windows matter
Compare the providers' published check frequency, alert latency, selected-store limits and delivery channels. These are different measurements: a frequent check does not guarantee that an email or push notification reaches you immediately. We have not independently tested the competitors' speed claims.
If you want your agent to watch
Duo Watch documents a public MCP connection and resource subscriptions. We did not verify a public MCP endpoint for the other tools during this review; that is not a claim that they offer no integrations.
What to check on any tracker
Look for a real last-check timestamp, a distinction between unknown and unavailable, supported stores, the exact configuration, and an explanation of source freshness. “In stock” is an observation, not a reservation. Always confirm pickup at checkout.
Sources reviewed November 12, 2026: the official pages linked in the table and Duo Watch's implementation. Features and prices may change. No affiliate links.