# Interval Timer Sec+Sec vs 1Timer

The clearest difference is rating: 1Timer at 4.7 against Interval Timer Sec+Sec's 3.7. 1Timer also leads on update cadence (every 6 weeks vs every 12 months) and ratings volume (1.2K vs 13). Interval Timer Sec+Sec's advantage is in-app purchases (none vs 5) and iOS requirement (13 vs 15.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. 1Timer sells 5 in-app purchases, starting at $0.99 per 7 days. Interval Timer Sec+Sec asks for nothing beyond the download.

1Timer holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: 1Timer has 1.2K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 78% of Interval Timer Sec+Sec's written reviews are positive against 81% of 1Timer's.

Interval Timer Sec+Sec ships an update every 12 months, 1Timer every 6 weeks. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Interval Timer Sec+Sec | 1Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (13 ratings)](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563/reviews) | **[4.7 (1.2K ratings)](https://appshunter.io/ios/app/1timer-voice-timer/id1357874791/reviews)** |
| Number of ratings | 13 | **1.2K** |
| Positive reviews | 77.8% of reviews | **81.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 12 MB | 18 MB |
| Requires iOS | **13** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Diffuse Thinking LLC](https://appshunter.io/developer/1692715488) |

## What reviewers say

### Interval Timer Sec+Sec

[App page](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563)

This free interval training timer app uses alarms and vibrations to mark specified second intervals. It automatically tracks repetitions and remembers your settings, making it ideal for High Intensity Interval Training (HIIT). Background operation is limited.

**Highlights:** Second-based interval timing, Alarm and vibration alerts, Repetition counter, Saves interval settings, Suitable for HIIT, Background operation limited

**Features:** Vision Pro support

**In-app purchases:** none


### 1Timer

[App page](https://appshunter.io/ios/app/1timer-voice-timer/id1357874791)

This app provides highly customizable voice timers for various activities like workouts, habits, and routines. Set per-second countdowns, interval reminders, and choose from multiple languages and voices for announcements. It offers quick access via widgets and works offline with VoiceOver support.

**Highlights:** Voice countdown announcements, Customizable reminder intervals, Multiple language and voice options, Chaining timers together, Widget for quick access, Works with locked screen, VoiceOver support

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $0.99 | per 7 days |
| Pro Monthly | $2.99 | per month |
| Pro Annual | $9.99 | per year |
| Pro Lifetime | $19.99 | one-time |
| Pro Lifetime | $39.99 | one-time |

**What reviewers like**

- 🚀 Customizable voice timers
- 👍 Helpful for productivity and focus
- 🔒 No ads or in-app purchases
- 🔒 Lifetime license option
- 👍 Intuitive and easy to use

**What reviewers complain about**

- 🐛 Unstable voice prompts
- 🐛 Ads on premium version
- 🔋 High battery consumption
- 🔒 Lifetime license not transferable to new devices
- 👎 Unintuitive UI in some areas

**Reported bugs**

- Ads closing the app
- Voice prompts not working after switching to background
- Timer number disappearing when closing app from background
- White noise/static audio issue

**Requested features**

- Delayed start option
- Ability to record custom voice messages
- More alarm sound options
- Apple Watch app
- Ability to organize timers into folders


## Frequently asked questions

### Is Interval Timer Sec+Sec free?

Interval Timer Sec+Sec is free to download, with no in-app purchases.

### Is 1Timer free?

1Timer is free to download, with in-app purchases available.

### Which has better reviews, Interval Timer Sec+Sec or 1Timer?

1Timer is rated higher. Interval Timer Sec+Sec averages 3.7 out of 5 from 13 ratings, while 1Timer averages 4.7 from 1.2K ratings.

### Do Interval Timer Sec+Sec or 1Timer have ads?

Both Interval Timer Sec+Sec and 1Timer show ads.

### Which is updated more often, Interval Timer Sec+Sec or 1Timer?

Interval Timer Sec+Sec ships an update every 12 months, and 1Timer every 6 weeks. Most recently, Interval Timer Sec+Sec was updated on September 24, 2026 and 1Timer on September 30, 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.*