# Interval Timer Sec+Sec vs Periodic Timer

The clearest difference is ads: Periodic Timer at none against Interval Timer Sec+Sec's shown. Periodic Timer also leads on rating (4.1 vs 3.7) and update cadence (every 2 months vs every 12 months). Interval Timer Sec+Sec's advantage is review sentiment (78% vs 52%) and iOS requirement (13 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Periodic Timer holds the better App Store score, 4.1 against 3.7. That said, the two scores are not equally well evidenced: Periodic Timer has 167 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 78% of Interval Timer Sec+Sec's written reviews are positive against 52% of Periodic Timer's, so the app with the better star average is not the one people write more warmly about.

Interval Timer Sec+Sec ships an update every 12 months, Periodic Timer every 2 months. The most recent releases landed on September 24, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Interval Timer Sec+Sec | Periodic Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (13 ratings)](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563/reviews) | **[4.1 (167 ratings)](https://appshunter.io/ios/app/periodic-timer/id933241656/reviews)** |
| Number of ratings | 13 | **167** |
| Positive reviews | **77.8% of reviews** | 52.1% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Ad-supported | **Free** |
| Size | 12 MB | 23 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Vladimir Kelin](https://appshunter.io/developer/933241655) |

## 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


### Periodic Timer

[App page](https://appshunter.io/ios/app/periodic-timer/id933241656)

This app provides a simple, repeating interval timer that can run in the background without distracting you. It offers customizable alerts, quick start options, and prevents your screen from locking while active. Ideal for various activities like fitness, cooking, and learning.

**Highlights:** Repeating interval timer, Background operation, Customizable alerts (vibration/sound), Prevent lockscreen, Shake to start, Multiple timer output modes

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive interface
- ⏱️ Effective repeating/interval timer functionality
- 🎯 Does exactly what it's designed to do
- 🔇 Vibration-only option available
- 📱 Works in background with screen off

**What reviewers complain about**

- 🔊 Sound/notification issues (unreliable or missing)
- 💰 Aggressive premium upselling in free version
- 🐛 Timer cancels when phone is shaken
- 🔋 Activates heart rate sensor, drains battery
- 📵 Doesn't work reliably with screen locked

**Reported bugs**

- Sound/notifications fail to trigger despite settings enabled
- Timer cancels when phone is shaken or moved
- Vibration doesn't work when screen is locked or off
- App crashes on launch (especially after updates)
- Watch app crashes or doesn't function

**Requested features**

- Adjustable sound volume and custom alert sounds
- Customizable vibration patterns
- Settings menu for user preferences
- Ability to add notes/labels to timers
- Seconds-only timer option


## Frequently asked questions

### Is Interval Timer Sec+Sec free?

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

### Is Periodic Timer free?

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

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

Periodic Timer is rated higher. Interval Timer Sec+Sec averages 3.7 out of 5 from 13 ratings, while Periodic Timer averages 4.1 from 167 ratings.

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

Interval Timer Sec+Sec shows ads; Periodic Timer does not.

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

Interval Timer Sec+Sec ships an update every 12 months, and Periodic Timer every 2 months. Most recently, Interval Timer Sec+Sec was updated on September 24, 2026 and Periodic Timer on September 29, 2026.

---

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