# Seconds Interval Timer vs LuckyBird Studio

The clearest difference is in-app purchases: LuckyBird Studio at none against Seconds Interval Timer's 1. LuckyBird Studio also leads on review sentiment (100% vs 74%) and rating (5.0 vs 4.7). Seconds Interval Timer's advantage is ratings volume (24K vs 3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase. LuckyBird Studio asks for nothing beyond the download.

LuckyBird Studio holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 74% of Seconds Interval Timer's written reviews are positive against 100% of LuckyBird Studio's.

Seconds Interval Timer ships an update monthly, LuckyBird Studio every 3 weeks. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | LuckyBird Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/luckybird-studio/id6788784636/reviews)** |
| Number of ratings | **24K** | 3 |
| Positive reviews | 74.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 121 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### Seconds Interval Timer

[App page](https://appshunter.io/ios/app/seconds-interval-timer/id475816966)

This app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.

**Highlights:** Full-screen colored display, Templates for HIIT, Tabata, Circuit Training, Voice and audio alerts, Music assignment per interval, Background operation, Apple Health integration, Stopwatch and countdown timer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Version | $7.99 | one-time |

**What reviewers like**

- 🚀 Great workout app
- 👍 Customizable and user-friendly
- 🔒 Reliable and stable
- 💡 Versatile for various workouts
- 👍 Easy to create and edit timers

**What reviewers complain about**

- 🐛 Occasional audio issues
- 🔍 Limited Apple Watch integration
- 💰 Paid version required for full functionality
- 🕰️ Time-consuming to set up complex workouts

**Reported bugs**

- Timer sometimes stops working unexpectedly
- Issues with restoring purchases on new devices

**Requested features**

- Ability to change beep/alert volume independently
- Option to delay transition between intervals
- Sync workouts across devices
- More preset workout templates
- Heart rate monitoring integration


### LuckyBird Studio

[App page](https://appshunter.io/ios/app/luckybird-studio/id6788784636)

Access a variety of movement classes including mat pilates, sculpt, yoga, and weight training. Enjoy pop-up classes, private party options, and an extensive on-demand library. A physical studio is also planned.

**Highlights:** Mat pilates classes, Sculpt workouts, Yoga sessions, Weight training, On-demand library, Pop-up classes

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Seconds Interval Timer free?

Seconds Interval Timer is free to download, with in-app purchases available.

### Is LuckyBird Studio free?

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

### Which has better reviews, Seconds Interval Timer or LuckyBird Studio?

LuckyBird Studio is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while LuckyBird Studio averages 5.0 from 3 ratings.

### Do Seconds Interval Timer or LuckyBird Studio have ads?

Neither Seconds Interval Timer nor LuckyBird Studio shows ads.

### Which is updated more often, Seconds Interval Timer or LuckyBird Studio?

Seconds Interval Timer ships an update monthly, and LuckyBird Studio every 3 weeks. Most recently, Seconds Interval Timer was updated on October 18, 2026 and LuckyBird Studio on October 9, 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.*