Quick answer
Start with fit, not a forced winner.
Start with the job you need the product to do, then compare the practical constraints that matter in your own setting. Every option below links to an exact reviewed NST product record. This page does not claim that one option is best for everyone, and it does not imply hands-on testing unless a linked assessment says so explicitly.
Decision table
Compare fit, evidence and limits before clicking.
Fast comparison is useful, but the table still keeps the evidence basis, limitations and retailer-link status visible. It is not a forced ranking.
| Option | Best fit | Evidence status | Main limitation | Retailer link |
|---|---|---|---|---|
Hevy Workout Tracker Checked 19 Sept 2026 | People who want a structured digital record of sets, repetitions and loads and accept the current account, social, privacy and free-tier limits. | Reviewed product record | NST has not independently tested reliability, accessibility, calculation accuracy, sync behaviour, privacy controls or current feature availability. | No affiliate link Product assessment |
Seconds Pro Interval Timer Checked 19 Sept 2026 | 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. | Reviewed product record | 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. | No affiliate link Product assessment |
Hevy Workout Tracker
- Best fit
- People who want a structured digital record of sets, repetitions and loads and accept the current account, social, privacy and free-tier limits.
- Evidence status
- Reviewed product record
- Main limitation
- NST has not independently tested reliability, accessibility, calculation accuracy, sync behaviour, privacy controls or current feature availability.
- Retailer link
- No affiliate link
Seconds Pro Interval Timer
- Best fit
- 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.
- Evidence status
- Reviewed product record
- Main limitation
- 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.
- Retailer link
- No affiliate link
What to compare
The details that make this decision clearer.
Purpose and fit
The useful choice depends on the reader's actual task, environment, existing equipment and tolerance for the product's trade-offs.
Verified product facts
Only identity and specification details already checked in the linked NST product records are used. Manufacturer statements are not treated as proof of outcomes.
Limitations and alternatives
Each option is considered alongside its known limitations, cheaper substitutes and the valid choice to buy nothing.
Which suits you
Compare the trade-offs side by side.
Option 1
Hevy Workout Tracker
A current workout-log app for recording sets, repetitions and loads, reviewing previous performance and building routines across supported devices. The free version has documented limits, and account-based social and measurement features create privacy choices that a paper log avoids.
May suit you if
People who want a structured digital record of sets, repetitions and loads and accept the current account, social, privacy and free-tier limits.
Useful strengths
- The current developer documentation confirms core set, repetition and load logging, previous-performance views, routine creation and progress statistics.
- The free version currently supports up to 4 routines, 7 custom exercises and 3 months of statistics history; these limits must be rechecked before publication.
Important limits
- NST has not independently tested reliability, accessibility, calculation accuracy, sync behaviour, privacy controls or current feature availability.
- The old claim that the app works offline was not established by the checked sources and has been removed.
- Apple and Google list categories of data the app may collect or link to a user; these are platform/developer declarations, not an independent NST privacy audit.
Option 2
Seconds Pro Interval Timer
An exact configurable interval-timer app candidate for iPhone and iPad. The official listing documents custom timers, spoken cues, background running and optional Apple Health use, but NST has not tested the app or established that paid software improves training outcomes.
May suit you if
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.
Useful strengths
- 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.
Important limits
- 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.
Bottom line
Choose for your real setup.
There is no universal winner. Choose the option whose intended use matches your situation and whose limitations you can accept. Read the linked product assessment before following any retailer destination, and buy nothing if your current setup already solves the problem.
This comparison does not publish a price, star rating, review count or paid ranking. Some linked product pages contain clearly labelled affiliate links; North Star Theory may earn a commission from qualifying purchases without changing the price paid.
