Seconds Interval Timer

Timer for HIIT, Tabata and interval training workouts.

Runloop · com.runloop.seconds.free

Not rated yet 1M+ downloads v3.5 13.1 MB Android 7.0+ PEGI 3 · Everyone

Download APK 13.1 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v3.5 (77)
Updated: Sep 9, 2026 (29 days ago)
APK size: 13.1 MB
Requires: Android 7.0+ (API 24)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Health & Fitness (app)
Listed since: Jul 11, 2021 (at least)
Permissions: 18 (3 sensitive)
Website: intervaltimer.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Seconds Interval Timer is an app by Runloop in the Health & Fitness category, listed since at least July 2021. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 3.4.14, the APK grew from 11 MB to 13.1 MB. Since version 3.4.10, the minimum Android version rose from 5.1 to 7.0. It asks for 18 permissions, 3 of them sensitive: read shared storage, modify shared storage and read media audio. It asks for the same permissions as version 3.4.15. The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.

What's new in v3.5

Bug fixes and performance improvements.

Description

From the listing uploaded by “appupdater”.

Seconds is widely recognised as the best interval timer for HIIT & Tabata training for mobile devices and is recommended by celebrity trainers and personal trainers to their clients all around the globe. BEFORE YOU DOWNLOAD: Non-paying users may create as many timers as they wish, but once an interval timer is started it may not be used again. Upgrading to the full version removes this restriction. FEATURES: • Large, full screen, color coded display that is easy to read from a distance. The display works in either landscape or portrait. • Templates for HIIT, Tabata and circuit training. A custom template to create every interval. And the compound editor where you can combine many interval timers into one. • Speaks your interval names so that you can follow a workout without seeing the screen at all. Seconds can even provide prior warning of the upcoming interval. Other alerts including beeps and bells are available. • Coordinate your music with your Tabata workout. Each interval can have its own music assigned allowing you to match the intensity of your music to the intensity of your HIIT workout. • Seconds runs in the background allowing you to either have your display off, or use other apps while the HIIT timer is active. • Export and import. Share the Tabata timers with friends or download them from the web and install them in Seconds.

Version history

4 versions are listed, going back to v3.4.10. Since v3.4.14 it requires Android 7.0+.

v3.5 LATEST Sep 9, 2026 13.1 MB TRUSTED v3.4.15 Oct 3, 2026 11 MB TRUSTED v3.4.14 Jun 27, 2025 11 MB TRUSTED v3.4.10 Feb 5, 2026 13.6 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 9, 2026.
Certificate issued to “Runloop Ltd” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Sep 9, 2026
Validated against Google Play Sep 9, 2026
Signed byO=Runloop Ltd
Signing certificate (SHA-1)26:A0:9B:B2:18:5E:1D:4C:A7:59:B7:F7:2E:76:54:6B:7C:2C:74:80
File MD57f71cee0430a5db4678075ea12de6c1e
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (18)

Seconds Interval Timer requests 18 permissions, 3 of them sensitive.

Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
Read media audio Sensitive android.permission.READ_MEDIA_AUDIO
Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Advertising ID com.google.android.gms.permission.AD_ID
Control vibration android.permission.VIBRATE
Foreground service media playback android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.runloop.seconds.free.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

Seconds Interval Timer APK: questions and answers

Is there a version of Seconds Interval Timer for older Android phones?

The current version needs Android 7.0 or later. Version 3.4.10 is the newest listed build that installs on Android 5.1 and later. Get version 3.4.10 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is Seconds Interval Timer free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the Seconds Interval Timer APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 7f71cee0430a5db4678075ea12de6c1e.