# Seconds Pro Interval Timer vs Voltage Power Studio

The clearest difference is price: Voltage Power Studio at Free against Seconds Pro Interval Timer's $7.99. Voltage Power Studio also leads on review sentiment (100% vs 80%) and iOS requirement (16.0 vs 18.0). Seconds Pro Interval Timer's advantage is ratings volume (12K vs 42) and chart position (#11 vs unranked). On rating, update cadence, ads and in-app purchases there is nothing between them.

Voltage Power Studio 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.

Voltage Power Studio 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 42, so its average is the more settled of the two. Written reviews point the same way: 80% of Seconds Pro Interval Timer's written reviews are positive against 100% of Voltage Power Studio's.

Seconds Pro Interval Timer ships an update fortnightly, Voltage Power Studio every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | Voltage Power Studio |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews) | **[5.0 (42 ratings)](https://appshunter.io/ios/app/voltage-power-studio/id6741540055/reviews)** |
| Number of ratings | **12K** | 42 |
| Positive reviews | 79.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#11** | — |
| Size | 98 MB | 38 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Voltage Academy of Dance LLC](https://appshunter.io/developer/1794631012) |

## What reviewers say

### Seconds Pro Interval Timer

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

**Currently charting:** #11 Top Paid · Health & Fitness, #127 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


### Voltage Power Studio

[App page](https://appshunter.io/ios/app/voltage-power-studio/id6741540055)

Easily browse and purchase class packs or membership options. View the schedule, filter classes by type, and manage your reservations to stay organized and committed to your fitness goals.

**Highlights:** Purchase class packs, Buy memberships, View class schedule, Filter classes by type, Manage reservations, Track upcoming classes

**Features:** macOS Compatibility, Apple Wallet

**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 Voltage Power Studio free?

Voltage Power Studio is free to download, with no in-app purchases.

### Which has better reviews, Seconds Pro Interval Timer or Voltage Power Studio?

Voltage Power Studio is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while Voltage Power Studio averages 5.0 from 42 ratings.

### Do Seconds Pro Interval Timer or Voltage Power Studio have ads?

Neither Seconds Pro Interval Timer nor Voltage Power Studio shows ads.

### Which is updated more often, Seconds Pro Interval Timer or Voltage Power Studio?

Seconds Pro Interval Timer ships an update fortnightly, and Voltage Power Studio every 3 weeks. Most recently, Seconds Pro Interval Timer was updated on October 25, 2026 and Voltage Power Studio on October 24, 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.*