Productivity

1843 open source Productivity apps

Hacker's Diet Offline
APK
The Hacker's Diet, published by John Walker, founder of Autodesk, Inc, and co-author of AutoCAD, as a handy Android app. You can track your weight and excercise and get a weighted moving average of your weight's change over time. The app can be used completely offline, with local backups being created as well. You can also optionally synchronise your weight to the Hacker's Diet Online at https://www.fourmilab.ch/cgi-bin/HackDiet which has additional features like weight gain/loss goals, Trend calculations, graphs over long periods and more.
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Hail
APK
Hail is a free-as-in-freedom software to freeze Android apps. Enjoy all features freely! Freeze Freeze is a word to describe the action of forbid apps when they are unnecessary to use device in a better way, cut down the usage of ram and save power. User can unfreeze it to revert. In general, "freeze" means disable, but also Hail can "freeze" apps by hiding and suspending them. Disable Disable apps will not shown in launcher. Enable them to revert. Hide Hidden apps will not shown in launcher and installed app list. Unhide them to revert. Suspend Suspended apps will be shown as grayscale icons in the launcher. Unsuspend them to revert. Working mode Hail can work with Device Owner, Dhizuku, Superuser (Root) and Shizuku (including Sui).
F-DroidGitHub
Haircomb
APK
Haircomb is a crypto currency token which runs on the bitcoin blockchain and claims to be quantum resistant. It was founded in 2019 and was enhanced ever since. This is a full featured package containing: Haircomb Core - the reference implementation of the consensus including a currency wallet. Comb Downloader - Used to fully synchronize Haircomb Core with the Bitcoin blockchain. Features of the Haircomb Core: Stealth addresses, allowing virtually unlimited receiving addresses for your key pair. Liquidity stacks, to pay to any number of recipients each time you transact. Merkle contracts - offer advanced use cases like a comb trade, amount decided later payment and auction. Testnet - to experiment with tokens that have no value (requires sync with the bitcoin testnet). Low memory mode - reduced RAM usage (the wallet starts more slowly in this mode). Features of the Comb Downloader: Accelerator sync, synchronizes you faster to the accelerator recommended by another user.
F-Droid
Hamfisted
APK
With this app, you can prepare for the amateur radio exam for classes N, E, and A. Practice all questions from the official question catalogs of the Federal Network Agency for the parts "Technology Class N", "Technology Class E", "Technology Class A", "Operating Technology", and "Regulations" and keep track of your progress. Use the option to simulate an exam and prepare for the real exam. The app is free, can be used offline, and contains no ads.
F-DroidGitHub
Hangar
APK
Provides a customizable shortcut launcher in your notification drawer to give you relevant, easy access to your most frequently used apps based on smart filtering algorithms. Features include: * Pinned apps * Icon packs and custom app icons * Re-sizeable widget to launch apps * Re-sizeable widget to view app use statistics with color coded bar graphs * Widgets intelligently scale according to size and device * Sort and display apps based on user specified weight factors * Blacklist unwanted apps * Fully customizable! Change the # of shortcuts, icon color, size and more..
F-DroidGitHub
HappyTaxes
APK
HappyTaxes is a private, offline-first cash-basis bookkeeping app with receipt OCR. Made for freelancers, sole traders, small business, even personal finance. Track your finances, prepare for tax time, and keep your data yours. KEY FEATURES • Track income and expenses with receipts • Generate compliant Profit & Loss reports • Maintain 6+ years of records • Receipt capture with OCR (Tesseract - on-device only) • Local backup & restore (ZIP export/import) • Soft delete with 30-day recovery • Work completely offline - no internet required • 100% private - your data never leaves your device PRIVACY FIRST • No data collection • No tracking or analytics • No ads • No cloud sync • All data stored locally on your device • You have complete control over your data PERFECT FOR • Online sellers tracking income and costs • Freelancers managing business finances • Small businesses needing simple bookkeeping • Personal expense tracking and budgeting • Anyone preparing for tax time • People who value privacy and offline functionality OPEN SOURCE Source code: https://github.com/dorumrr/happytaxes License: MIT Issues: https://github.com/dorumrr/happytaxes/issues Late nights for brighter days. Created by Doru Moraru
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Harp
APK
Harp is a privacy centric on-device Personal Health Record application allowing you to create and manage records in plain Org Mode files that are completely under your control. Track journals, metrics, reminders, and medical documents in one place without any cloud account requirement. Files are stored in a transparent, portable Org-based structure, so your data remains readable outside the app and easy to version, sync, or back up with tools you already trust. Attach photos and files to entries, search across your records, and keep sensitive health information local-first by default.
F-Droid
Hash Checker
APK
Fast and simple application for generating and comparison MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 and CRC-32 hashes from files or text.User guideVideo
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Hate It Or Rate It
APK
Introducing "Hate it or Rate it," the innovative app designed to transform your shopping experience by allowing you to keep track of products you love and those you'd rather avoid. Whether you're exploring new items or revisiting past purchases, "Hate it or Rate it" provides a simple yet powerful platform to manage your shopping decisions effectively. Key Features: Product Tracking: Easily upload photos, names, descriptions, and store information of your favorite and not-so-favorite products. Informed Decisions: Make smarter purchase decisions based on your own historical ratings and experiences. Easy Organization: Sort your products into 'Hate' or 'Rate' categories for quick reference and decision-making. Privacy First: With optional Google Analytics and Firebase Crashlytics integration, you're in control of your data. Opt in or out anytime for a personalized app experience. Whether you're a meticulous shopper who loves to keep detailed records of every purchase or someone looking for a fun way to track the hits and misses in your shopping adventures, "Hate it or Rate it" is your go-to companion. Join the "Hate it or Rate it" community today and start making informed decisions that save you time and money, all while enjoying a tailored shopping journey!
F-DroidGitHub
Headi - Your headache diary
APK
Headi (Headache Diary) is a privacy-friendly app to log your headaches. No data is transferred to any cloud services. All data is stored locally only. Headi also offers a simple analysis of the recorded data. You can also export your logs as a CSV file for further analysis of the data. To save your records you can also export your whole diary, or just parts of it, as a PDF.
F-DroidGitHub
Headphone indicator
APK
Shows a notification icon in the status bar when headphones are plugged into the phone. Shows a different icon when a headset is attached. Both 3.5mm audio jack devices and USB headphones/headsets are supported. The app aims to be a tiny as possible. No ads, no analytics - just its core functionality. After installation, you have to start the application at least once. Then it will be running as a background service that shows the headset status icon whenever the headphones are plugged in. I wrote the headphone indicator app because I was immensely unsatisfied with apps like (google forced me to remove the name) which are over 2 MiB in size, but 99% of their code is only related to advertisement. Open Source - licensed under the GPLv3+. The source code can be inspected by anyone.
F-DroidGitHub
HealthLog
APK
Keep track of your medical test records to monitor your progress and become healthier.The project is currently in a beta testing phase. Used it for multiple users and works well enough for daily use, but if you encounter any bugs please report them. I'll try my best to fix them.Features:Allows health test reading data storage for multiple usersBlood Pressure, Blood Sugar/Glucose, Cholesterol, Renal Function Test, Notes can be savedAcceptable range for Blood Glucose (Sugar) reading configurable via slider in settingsGraph view of last 30 readings (for now)No Ads and Tracking (Has no Internet permission)Limited dependencies for reduced binary size. Currently under 8MBTested on Android 6 and up (although only a few devices)Can enable data file backup on every entry to prevent data lossFree and Open SourceDrawbacks:Data is not encrypted on storage. Local SQLite database stores data in json formatCurrently in beta testing state. (Report bugs and UI/UX issues)Some acceptable ranges for some test aren't configurable yetSome (old)keyboards cannot create newline on notes
GitHubIzzyOnDroid
Healthy Battery Charging
APK
Make your smartphone or tablet battery last longer! Good range to aim for when charging a Li-ion battery is from about 40 to 80 percent in one go. A bunch of tiny charges throughout the day is your second best bet, and going from zero to 100 and then 100 to zero on a regular basis will put the most strain on your lithium-ion battery. Healthy Battery Charging notifies you when to plug or unplug your phone from the charger in order to improve the battery life. The app itself is optimized for low battery consumption, running in the background and checking the battery level every 15 minutes (configurable). The exact timing of these checks depends on the Android OS, which might schedule them alongside other tasks or delay them when in sleep mode. As a result, the battery level may slightly exceed the high threshold while charging or drop slightly below the low threshold while discharging before you receive a notification. For those who want to know more technical details about Li-ion batteries: https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
F-DroidGitHubIzzyOnDroid
Heart Alert
APK
When your BPM goes out limit BPM, you get sound alert.Warning! This app can run in the background, but your phone may kill it. How to prevent this read here: dontkillmyapp.com.Supported devices:Polar H10Polar H9Polar H7Polar OH1Polar Verity Sense
GitHubIzzyOnDroid
HeartBeat
APK
Simple way to estimate the heart rate. Please do not use it for medical purposes ! This utility works by covering the flash as well as the device's camera with a finger, and waiting for 10 seconds. It works best when the person stays still, and the environment is dark. The phone analyzes the amount of red captured by the camera, and attempts to calculate the heart rate based on the subtle changes it detects. During the measurement, the application shows the current calculation results, and shows the captured data on a line chart. Once completed, the following further details are shown: Standardized values, along with their timestamp (the values are scaled between 0 and 1, and a rolling average is applied for smoothing) Timings where a new heart beat is detected. These data can be shared with other application in order to be exported.
F-DroidGitHub
HeartRateMonitor
APK
A simple heart rate monitor, using the device's camera to attempt to detect a pulse in your finger.
F-DroidGitHub
HeatCalc
APK
Calculates the required heat sink for an electronic device.
F-Droid
HeliBoard
APK
HeliBoard is a privacy-conscious open-source keyboard, based on AOSP / OpenBoard. Does not use internet permission, and thus is 100% offline. Features: Add dictionaries for suggestions and spell check build your own, or get them here, or in the experimental section (quality may vary) additional dictionaries for emojis or scientific symbols can be used to provide suggestions (similar to "emoji search") note that for Korean layouts, suggestions only work using this dictionary, the tools in the dictionary repository are not able to create working dictionaries Customize keyboard themes (style, colors and background image) can follow the system's day/night setting on Android 10+ (and on some versions of Android 9) can follow dynamic colors for Android 12+ Customize keyboard layouts (only available when disabling use system languages) Customize special layouts, like symbols, number, or functional key layout Multilingual typing Glide typing (only with closed source library ☹️) library not included in the app, as there is no compatible open source library available can be extracted from GApps packages ("swypelibs"), or downloaded here (click on the file and then "raw" or the tiny download button) Clipboard history One-handed mode Split keyboard (only available if the screen is large enough) Number pad Backup and restore your settings and learned word / history data
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Hertz contact
APK
Hertz contact application provides calculation on static mechanical ball-on-flat contact using materials properties.
F-Droid
Het Saldo
APK
Het Saldo is a De Lijn "smart"card saldo checker. It allows you to easily keep track of the remaining trips on your De Lijn tickets. The app lets you add multiple tickets and syncs their status and remaining balance for you to check.
F-Droid
Hex Launcher
APK
Hex Launcher is a minimalist, performant, private, and open-source home screen replacement. Minimalist: Hex Launcher is optimized to bring the app you want directly to your thumb. Nothing more, nothing less. Performant: Hex Launcher was written from the ground up to be as small and fast as possible. It will not drain your battery, and it will not leave you waiting. Private: Hex Launcher does not track you. It contains no ads, and no analytics of any kind. It can't even connect to the internet. If you want privacy, you will find it with Hex Launcher. Open Source: Hex Launcher is designed and maintained by one person, with a commitment towards being open and accepting feedback. The source is available on Github at https://github.com/MrMannWood/launcher Make Your Phone Work For You Hex Launcher was designed to get you into your apps as quickly as possible, and to prevent you from mindlessly looking for a new way to doom scroll. It provides a search-first UI that puts your results directly under your thumb, and allows you to set up six apps for fast access with gestures. Take Back Your Privacy Hex Launcher does not contain trackers, analytics, or data gathering mechanisms; it can't even connect to the internet. With Hex Launcher, what happens on your home screen stays on your phone. If you want to help the developer, you can choose to enable on device logging and provide bug reports via email. These options are off by default. Your phone and your data are yours.
F-DroidGitHub
HiddenSettings
APK
HiddenSettings is an activity manager that helps you access Androidsettings and activities your ROM or launcher doesn’t expose.Features:- Search all available activities- Add, rename, and delete favorites- Import and export favorites⚠️ Note: Hidden settings vary by ROM. The app comes unconfigured;you can build your own favorites list or import one.
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Hide "running in the background" Notification
APK
Hide the annoying "running in the background" notification with this simple and small app. Just keep it installed and this annoying notification will never appear again. You can choose for which app this notification should be hidden.
F-DroidGitHub
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HideMockLocation
APK
This module prevents detection of mock location on Android 6 or higher. If you are using LSPosed, you need to enable it for each app it should cover.
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