Seconds Pro Interval Timer

May find it useful

iPhone or iPad users who already know the work, rest and transition intervals they want and prefer reusable spoken or visual cues instead of watching a clock.

May not need it

Android users, who face a separate app build and disclosure; people satisfied with a built-in stopwatch, clock timer, watch timer or physical timer; anyone who does not want the optional account, sharing or Apple Health data flows.

Advantages

• The current iOS listing includes templates, custom and compound timers, spoken and visual cues, background running, timer sharing and Apple Watch support.
• Seconds Pro is described as a one-time paid download with unrestricted timers, while the separate free Seconds app allows one run per created timer before its own upgrade.

Limitations

• NST has not tested timer accuracy, alert reliability, background operation, offline behavior, ease of use, music behavior, syncing, Apple Watch use, battery effect, support or data deletion.
• The app only times instructions supplied by the user. It does not choose safe or effective exercise, intensity, rest, progression or recovery and does not prove better training outcomes.
• The iOS product currently requires iOS 18 or later or iPadOS 18 or later. Apple Watch support currently requires watchOS 26 or later; compatibility can change and must be rechecked.
• The free Seconds app, Seconds Pro and the Android builds are separate products. Purchases are not interchangeable and platform-specific behavior and privacy disclosures must not be merged.
• Optional Apple Health use can save workouts or mindful sessions and, with a connected heart-rate monitor, read body measurements and year of birth to estimate calories. NST has not validated those estimates.
• Apple’s privacy label is supplied by Runloop and not verified by Apple. It says health and fitness, email, support content and user ID may be linked to identity, with purchase, device and diagnostic data also potentially collected.
• Runloop’s broader privacy policy covers multiple services and discloses accounts, device and usage data, service providers and international processing; it requires named privacy appraisal rather than a simplified privacy claim.
• Apple says the developer has not declared supported accessibility features. This is an absence of disclosure, not proof that the app is inaccessible.
• No price, rating, rank, review count, download count, affiliate link or app-store image is recorded.