# Seconds Pro Interval Timer vs StrengthIQ

The clearest difference is price: StrengthIQ at Free against Seconds Pro Interval Timer's $7.99. StrengthIQ also leads on update cadence (every 5 days vs fortnightly) and rating (5.0 vs 4.8). Seconds Pro Interval Timer's advantage is ratings volume (12K vs 1) and chart position (#7 vs unranked). On ads, in-app purchases and iOS requirement there is nothing between them.

StrengthIQ is free to download; Seconds Pro Interval Timer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

StrengthIQ holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 1, so its average is the more settled of the two.

Seconds Pro Interval Timer ships an update fortnightly, StrengthIQ every 5 days. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | StrengthIQ |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/strengthiq/id6761685478/reviews)** |
| Number of ratings | **12K** | 1 |
| Positive reviews | 79.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#7** | — |
| Size | 94 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [MICHAEL ANTHONY ROBERTS](https://appshunter.io/developer/1890858382) |

## What reviewers say

### Seconds Pro Interval Timer

[App page](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811)

**Currently charting:** #7 Top Paid · Health & Fitness, #88 Top Paid (US App Store)

This interval timer app is designed for high-intensity interval training (HIIT), Tabata, and circuit training workouts. It features a large, color-coded display, customizable interval names, and background operation. It also integrates with Apple Health to track your fitness data.

**Highlights:** Full screen colored display, Templates for HIIT, Tabata, Circuit Training, Speaks interval names and provides warnings, Assign music per interval, Runs in background, Share interval timers, Apple Health integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ⭐ Great updates
- 🤖 Amazing voice prompts
- 👍 Easy to use
- 🎨 Highly customizable
- 🔧 Versatile for various workouts

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔌 Music volume issues
- 🔍 Complicated setup for some features
- 🌐 Sync/sharing issues between devices
- 🔇 Inconsistent audio cues

**Reported bugs**

- Intervals randomly pausing or skipping
- Music volume issues when launching the app
- Inconsistent audio cues and countdown
- Sync issues between devices

**Requested features**

- Ability to lock Apple Watch screen
- Option to see more than just the next exercise
- Fractional time settings (e.g. 7.74 seconds)
- More voice/audio customization options
- Improved sync between iPhone and iPad


### StrengthIQ

[App page](https://appshunter.io/ios/app/strengthiq/id6761685478)

Log barbell lifts and pull-ups with detailed set tracking. View exercise history and trends with suggested loads and estimated 1RM calculations. Workout data is stored locally on your device for privacy.

**Highlights:** Log barbell lifts and pull-ups, Track weight, reps, and set styles, Suggested loads and estimated 1RM, Dedicated pull-up tracking, Privacy-focused local data storage, Exercise-specific accent colors

**In-app purchases:** none


## Frequently asked questions

### Is Seconds Pro Interval Timer free?

Seconds Pro Interval Timer costs $7.99, with no in-app purchases.

### Is StrengthIQ free?

StrengthIQ is free to download, with no in-app purchases.

### Which has better reviews, Seconds Pro Interval Timer or StrengthIQ?

StrengthIQ is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while StrengthIQ averages 5.0 from 1 ratings.

### Do Seconds Pro Interval Timer or StrengthIQ have ads?

Neither Seconds Pro Interval Timer nor StrengthIQ shows ads.

### Which is updated more often, Seconds Pro Interval Timer or StrengthIQ?

Seconds Pro Interval Timer ships an update fortnightly, and StrengthIQ every 5 days. Most recently, Seconds Pro Interval Timer was updated on October 12, 2026 and StrengthIQ on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*