Karnaugh & Boolean Minimizer vs Birdathon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Karnaugh & Boolean Minimizer
Simplify complex Boolean expressions and Karnaugh maps with step-by-step solutions. This tool supports up to 26 variables and offers multiple minimization algorithms for digital logic design.
- Minimize Karnaugh Maps up to 8 variables
- Step-by-step Boolean expression simplification
- Quine–McCluskey algorithm for functions up to 8 variables
- Multi-Output minimization with Espresso algorithm
- View minimized solutions in SOP/POS forms
- Generate circuits from minimized solutions
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Karnaugh & Boolean Minimizer is an innovative and versatile application for simplifying Karnaugh Maps and Boolean expressions. It is geared for those involved in engineering fields, more precisely electrical engineering students, academics, digital devices constructors or anybody involved with Boolean expressions. With its powerful minimization capabilities and full-fledged features, this tool gives you the flexibility to work with all forms of Boolean expressions and provides quality solutions. Features: - Minimize Karnaugh Maps up to 8 variables - Step-by-step simplification of Boolean expressions up to 26 (A-Z) variables using Boolean algebra laws and theorems - Step-by-step simplification of Boolean functions up to 8 variables by the Quine–McCluskey algorithm, showing the prime implicant chart and using Petrick's method where appropriate - Multi-Output minimization up to 8 inputs and 8 outputs, using the de-facto industry standard Espresso algorithm - View minimized solutions on Karnaugh Map in Sum-of-Product (SOP/CNF) and Product-of-Sum (POS/DNF) forms - Support Don't Cares - Fill Karnaugh map using truth table, sets of terms and Boolean expressions - View all possible solutions for Karnaugh Maps up to 5 variables - Guaranteed minimal solution when using the Karnaugh Map, Quine–McCluskey and Algebraic Minimizer - Highlight minimized term on Karnaugh map - Optimization of minimized solutions with XOR gates - Generate circuit from minimized solution with AND/OR/NAND/NOR logic gates - Generate random Karnaugh Maps, truth tables and Boolean expressions - Custom keyboard for easy input of Boolean expressions - Support all Boolean operators and constants - Fully customizable Karnaugh Map orientation, variable names, operator symbols and expression format - Import/Export Karnaugh Maps and truth tables as CSV files - Beautiful Dark Mode
Birdathon
This app helps birdwatchers create and organize detailed checklists of their observations. It automatically records time and location, allowing for easy editing and customization. Users can visualize their sightings on maps, add field notes, and export data for sharing or further analysis.
- Observation-centric checklists
- Automatic time and location recording
- Customizable maps with boundary overlays
- Field notes for additional observations
- Multiple checklist sorting options
- Data export to CSV and other formats
- Create checklist templates
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Birdathon is an observation-centric tool for creating birding checklists. It helps you organize your checklists and share them with others. Use Birdathon in the field to quickly record whether and where a bird is seen or heard and the number observed. The time and location of each observation is automatically recorded. You can adjust the location, time entries and the count of birds observed at any time to ensure your records are accurate. You can add breeding codes to your observations. Checklist maps display the locations of your observations. You can overlay county boundaries for every US state. You can add a range circle such as a 5MR (5-mile Radius) to your maps. You can import and overlay custom kml/kmz files onto your maps. An Overview feature lets you see your combined observations for any time period, and displays a map showing any boundaries you have selected, so you can utilize the map feature even when you are not actively checklisting. You can export Overview data into a csv text file or create a new checklist template from the Overview. Your checklists can be viewed in taxonomic order, alphabetically, by rarity or as a timeline of species. You can enrich your checklist with field notes and add observations such as mammals, butterflies, wildflowers, etc., to make it a more complete record of your experience. You can organize your checklists into categories such as Day List, Year List, County List, Life List, etc., and assign color themes to your lists. Bird species may be added and deleted from your lists at any time. You can create new checklist templates from your previous lists or import templates created by others. You can change which template is being used. You can import text files into Birdathon, making them into templates or new checklists. Different export options for your checklists allow you to import into eBird or another copy of Birdathon. The bird species source data and other resources used in this app come from the following sources: AviList, a unified global checklist of birds, is the core data set used for Birdathon. https://www.avilist.org. Some data has been integrated from the following sources: The eBird/Clements checklist of birds of the world (https://www.birds.cornell.edu/clementschecklist/download/), the American Ornithological Society's (AOS) Checklist of North and Middle American Birds (https://checklist.americanornithology.org), and the American Birding Association's (ABA) checklist of North American Birds (https://www.aba.org/listing-taxonomy/) Alpha codes come from The Institute for Bird Populations’ Standardized 4- and 6-letter Bird Species Codes. https://www.birdpop.org/pages/birdSpeciesCodes.php. County boundary data is from the United States Geological Survey (USGS) TIGER/Line 2019 Shapefiles found on the United States Census Bureau's website at https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.2019.html. Boundaries should be used as general guidelines and not be considered precise. Note especially where county boundaries follow creeks, rivers, ridge lines and other natural features, and so are of much finer resolution than can be shown on Birdathon’s maps. California breeding bird atlas blocks come from the California Bird Atlas, https://www.californiabirdatlas.org. California Bird Atlas logo and breeding code descriptions used with permission.
Screenshots
Verdict
The clearest difference is price: Birdathon at Free against Karnaugh & Boolean Minimizer's $5.99. Birdathon also leads on rating (4.7 vs 4.2) and review sentiment (100% vs 71%). Karnaugh & Boolean Minimizer's advantage is in-app purchases (none vs 4) and update cadence (monthly vs every 4 months). On ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Birdathon is free to download; Karnaugh & Boolean Minimizer costs $5.99 up front. Birdathon sells 4 one-off in-app purchases. Karnaugh & Boolean Minimizer asks for nothing beyond the download.
Birdathon holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 22 and 15 respectively. Written reviews point the same way: 71% of Karnaugh & Boolean Minimizer's written reviews are positive against 100% of Birdathon's.
Karnaugh & Boolean Minimizer ships an update monthly, Birdathon every 4 months. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.
| Parameter | Karnaugh & Boolean Minimizer | Birdathon |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.2 (22 ratings) | 4.7 (15 ratings) — better |
| Positive reviews | 70.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 22 — better | 15 |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 6 MB | 192 MB |
| Age rating | 4+ | 4+ |
| Developer | Ketan Appa | Barry Langdon-Lassagne |
Customer experience
Karnaugh & Boolean Minimizer
Birdathon
In-app purchases
Karnaugh & Boolean Minimizer
No in-app purchases
Birdathon
- Good Tip$0.99
- Great Tip$1.99
- Amazing Tip$2.99
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- Incredible Tip$4.99






