Useful Knots - Tying Guide

Some of the best knots you can tie!

Nynix LLC · com.neptuns.usefulknots

Not rated yet 1M+ downloads v2.5.5.0 18.9 MB Android 6.0+ PEGI 3 · Everyone

Download APK 18.9 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v2.5.5.0 (155)
Updated: Mar 26, 2026 (6 months ago)
APK size: 18.9 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Books & Reference (app)
Listed since: Mar 15, 2022 (at least)
Permissions: 7
Developer contact: [email protected]

About this APK

Useful Knots - Tying Guide is an app by Nynix LLC in the Books & Reference category, listed since at least March 2022. It has no native code, so it runs on any Android processor.

Since version 2.5.2.1, the minimum Android version rose from 4.4 to 6.0. It asks for 7 permissions, none of them sensitive. It asks for the same permissions as version 2.5.4.0. The app can read the advertising ID that ad and analytics services use.

What's new in v2.5.5.0

Custom colors. Bug fixes. Targeting latest Android.

Description

From the listing uploaded by “appupdater”.

Useful Knots is a quick reference for a number of most practical knots. There are hundreds or even thousands of knots out there and each has its specific uses. But in everyday situation average person has no time to learn them or look through all of them and pick the best one. Useful Knots offer a selected list of the best knots for most practical situations. Knots are categorized by type and each knot has a description and step by step instructions with pictures and guide on how to tie it. Knot pictures are stored offline and no internet connection is required for application to work.

Version history

4 versions are listed, going back to v2.5.2.1. Since v2.5.5.0 it requires Android 6.0+.

v2.5.5.0 LATEST Mar 26, 2026 18.9 MB TRUSTED v2.5.4.0 Nov 10, 2025 17.7 MB TRUSTED v2.5.3.1 Oct 28, 2024 20.5 MB TRUSTED v2.5.2.1 May 21, 2024 18.3 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Mar 26, 2026.
Certificate issued to “Neptuns” 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 Mar 26, 2026
Validated against Google Play Mar 26, 2026
Signed byCN=Neptuns, L=Riga, ST=Latvia, C=LV
Signing certificate (SHA-1)7C:DB:78:27:FB:22:87:F1:B8:36:0E:DE:CA:D1:16:5F:7A:6B:48:93
File MD5ce4c8fbf63ebdcbd2062b150346703d7
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 (7)

Useful Knots - Tying Guide requests 7 permissions, none of them sensitive.

Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) com.neptuns.usefulknots.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

Useful Knots - Tying Guide APK: questions and answers

Is there a version of Useful Knots - Tying Guide for older Android phones?

The current version needs Android 6.0 or later. Version 2.5.4.0 is the newest listed build that installs on Android 5.0 and later. Get version 2.5.4.0 · 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 the Useful Knots - Tying Guide 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 ce4c8fbf63ebdcbd2062b150346703d7.