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Last updated on: 2026-05-30
Android Apps > Tools > NumSys
NumSys icon

NumSys

2.5.0
Sandello
4.88
523 reviews
100,000+
Downloads
Free

Number Systems Converter and Calculator with solution.

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About NumSys

NumSys is a tools app developed by Sandello.

Download Statistics

NumSys has been downloaded 160 thousand times. In the last 30 days, the app was downloaded 650 times.

User Ratings

NumSys is rated 4.88 out of 5 stars. The rating is based on 520 ratings.

App Information

NumSys is FREE to download. The APK download size is 3.70 MB. The latest version available is 2.5.0. The last update was on May 14, 2026.

Technical Requirements

NumSys requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play January 2016.

Description
Simple and intuitive to use converter and calculator of number systems with a complete solution and decimal fractions.
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More data about NumSys

Price Free to download
Total downloads 160 thousand
Recent downloads 650
Rating 4.88 based on 520 ratings
Ranking Not ranked
Version 2.5.0
APK size 3.70 MB
Number of libraries 14
Designed for Android 5.0+
Suitable for Everyone
Ads NO ads

App Performance Report

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Decimal to Fraction icon Decimal to Fraction
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Fraction to Decimal icon Fraction to Decimal
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Decimal to Fraction Pro icon Decimal to Fraction Pro
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Fraction Decimal Calculator icon Fraction Decimal Calculator
Pricereduc
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NumSys compared with similar apps

Common keywords of similar apps

Systems Solution Number Converter Calculator Decimal Fractions Support

Keywords missing from this app

Fraction Convert Step Numbers Calculations Math App Mixed Free Calculation Result Operations Enter Features System Decimals Division Press Recent Multiplication Addition Button Hexadecimal Calculate Problems Tool Version Unit Results Easy Simple Time Subtraction Binary Octal Conversion Keyboard Students Advanced Supports Strong Basic Currency Learn

More from Sandello

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Google Play Rating history and histogram

460
61
0
0
0

Downloads over time

NumSys has been downloaded 160 thousand times. Over the past 30 days, it averaged 22 downloads per day.

Changelog of NumSys

  • May 14, 2026UpdateVersion 2.5.0
  • Feb 13, 2026UpdateVersion 2.4.2
  • Jan 27, 2026UpdateVersion 2.4.1
  • Dec 15, 2025UpdateVersion 2.4.0
  • Jun 14, 2025UpdateVersion 2.3.0
  • May 13, 2025UpdateVersion 2.2.8
  • Oct 27, 2024UpdateVersion 2.2.5
  • Oct 17, 2024UpdateVersion 2.2.4
  • Sep 8, 2024UpdateVersion 2.2.3
  • Jul 31, 2024UpdateVersion 2.2.2
  • Jul 12, 2024UpdateVersion 2.2.1
  • Feb 4, 2024UpdateVersion 2.2.0
  • Sep 24, 2023UpdateVersion 2.1.1
  • Aug 20, 2023UpdateVersion 2.1.0
  • Jul 19, 2023UpdateVersion 2.0.3
  • Jul 14, 2023UpdateVersion 2.0.1
  • Apr 26, 2023UpdateVersion 2.0.0
  • Mar 13, 2023Installs100,000+ installs
  • Jan 15, 2022Installs50,000+ installs
  • Feb 1, 2021UpdateVersion 4.1.3
  • Jan 24, 2021UpdateVersion 4.1.2
  • Oct 21, 2020UpdateVersion 4.1.1
  • Oct 4, 2020UpdateVersion 4.1
  • May 26, 2020UpdateVersion 4.0.10
  • Feb 19, 2020UpdateVersion 4.0.8
  • Jan 8, 2020UpdateVersion 3.0.7
  • Dec 27, 2019Installs10,000+ installs
  • Aug 20, 2019UpdateVersion 3.0.4
  • Jul 11, 2019UpdateVersion 2.6.2
  • May 17, 2019Installs5,000+ installs
  • May 6, 2019UpdateVersion 2.6.1
  • Nov 15, 2018UpdateVersion 2.3.11
  • Sep 16, 2018UpdateVersion 2.1
  • May 22, 2018Installs1,000+ installs
  • Jan 21, 2018Installs500+ installs
  • Aug 16, 2017UpdateVersion 2.01
  • Aug 6, 2017UpdateVersion 2
  • Oct 24, 2016Installs100+ installs
  • May 22, 2016Installs50+ installs
  • Apr 22, 2016UpdateVersion 1.3
  • Feb 20, 2016Installs10+ installs
  • Feb 13, 2016Installs5+ installs
  • Feb 13, 2016UpdateVersion 1.21
  • Feb 4, 2016UpdateVersion 1.2
  • Jan 31, 2016UpdateVersion 1.15
  • Jan 25, 2016Price DropNew price: Free ($0.99)
  • Jan 21, 2016Installs1+ installs
  • Jan 16, 2016New AppVersion 1.0 in TOOLS for $0.99
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Developer information for Sandello

Sandello

sandello.team@yandex.ru

Website

N/A

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Comments on NumSys for Android

★★★★★ Sriram Venkataramani · Apr 23, 2021
Trinery is non utf, it can be used in schools and colleges for learning computational (computer math. This is because it uses 3-step multiplication, anf division as;3 x3 ot 3/3/3. In a cube of six sides the number to be multipled or divided is used by 3 succeeding sides and the answer is displayed in 3 steps by the othe 3 succeeding cubes.rubixcubixetc,
★★★★★ CHAITANYA SHEDGE · Aug 26, 2022
Love it!!!! It's very helpful for cross-checking answers for beginners 👍🏻👍🏻
★★★★★ LJ Gabrillo · Jun 22, 2024
This app is a gem. Modern looking and straight forward. It even provides an explanation section detailing how the calculations were done 👍
★★★★★ Muhammed Shabeer OP · Dec 20, 2021
Super and incredible app for students who really needs to sudy those number system. This includes the explanation of each method with divisions and multiplication. And a binary calculator.
★☆☆☆☆ Carr Andre Amistad · May 30, 2022
In calculator when I try to type "A5" its "AA5" FIX THIS ASAP
★☆☆☆☆ Shivaay · Jul 7, 2021
Takes 5-6 MB data every time I open the app & I have no idea why is that !

Google Play Rankings for NumSys

This app is not ranked

Technologies used by NumSys

NumSys is requesting 9 permissions and is using 15 libraries.

Permissions

Network communication
view network connections, full network access, Google Play license check
System tools
prevent phone from sleeping
Extra
android.permission.ACCESS_ADSERVICES_AD_ID, android.permission.ACCESS_ADSERVICES_ATTRIBUTION, com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE, com.google.android.gms.permission.AD_ID, ru.sandello.binaryconverter.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Ad network libraries

AdMob Android Library IconAdMob

Social libraries

None found

Development tools

Android Jetpack core Android Library IconAndroid Jetpack core Android Architecture Components Android Library IconAndroid Architecture Components Android Jetpack VersionedParcelable Android Library IconAndroid Jetpack VersionedParcelable Firebase Android Library IconFirebase Android Jetpack Annotations Android Library IconAndroid Jetpack Annotations Android Jetpack Widgets Android Library IconAndroid Jetpack Widgets Android Jetpack AppCompat Android Library IconAndroid Jetpack AppCompat AndroidX Activity Android Library IconAndroidX Activity Android Activity Saved State Android Library IconAndroid Activity Saved State Android Jetpack Media Android Library IconAndroid Jetpack Media Kotlin Android Library IconKotlin Android WorkManager Android Library IconAndroid WorkManager AndroidX Widget ViewPager2 Android Library IconAndroidX Widget ViewPager2
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