Comparison

DayNumCalc vs HAMmade GRID

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DayNumCalc

This utility app provides quick access to date calculations, including finding the day number for any date, determining a date from a day number, calculating the difference between two dates, and checking the day of the week. It also offers widgets for convenient access on your home and lock screens.

Highlights
  • Calculate day number from date
  • Determine date from day number
  • Calculate days between two dates
  • Add/subtract days from a date
  • Check day of the week
  • Home screen widgets
  • Today View widgets
  • Lock screen widgets
Read full description

DayNumCalc gives easy access to basic date calculations: - The current date/day number information is immediately available. Examples: day 1 = 1 January; day 365 = 31 December (non-leap year) or 30 December (leap year) - Date/day number calculations: get the day number from a chosen date, and a date from a paired year/day number - Calculate the number of days between two dates - Determine a date after adding or subtracting a number of days fro a chosen date - Check the day of the week for a date of your choice Widgets for the Home Screen, the Today View, and the Lock Screen are available for ease of use.

About

HAMmade GRID

Features
Read full description

Designed specifically for Amateur Radio Operators (Hams), HAMmade Grid is your ultimate companion for DXing, contesting, and field operations. The app now supports 6, 8, and 10 character Maidenhead Grid Locators, allowing more precise location information for advanced radio operations. Whether you are operating from your home QTH or working portable/rover; instantly find your Maidenhead Grid Locator, visualize the target station on the map, and point your antenna with precision. Key Features: -Precise Location & Grid: Instantly calculates your 6-character Maidenhead Grid Locator using real-time GPS data.  -Callsign Lookup: Enter any callsign to automatically fetch location, name, and station details. (requires paid QRZ.com membership) -QRZ.com & HamDB Integration: Log in with your QRZ.com account to access detailed profiles and station photos. No account? No problem. The app automatically falls back to HamDB public data for seamless lookups.  Band Availability Insight The app can now display the radio bands that are usable between two selected Maidenhead grid locators. This helps operators quickly evaluate which bands are likely to work at a given moment, making it easier to plan contacts, portable operations, and DX activities. -Smart Compass & Bearing: Calculates the exact Heading and Distance to the target station. The integrated live compass overlay helps you align your antenna directly to the signal source.  -Advanced Mapping: Visualize the target Grid square with Standard, Satellite, and Hybrid map modes.  -Unit Support: Switch between Kilometers (km) and Miles (mi) effortlessly.  -Dark Mode: Eye-friendly interface optimized for night operations.  -Multi-Language: Supports English, Turkish, Spanish, German, French, and more.

Screenshots

DayNumCalc4 screens
HAMmade GRID4 screens

Verdict

The call

The clearest difference is price: HAMmade GRID at Free against DayNumCalc's $0.99. HAMmade GRID also leads on update cadence (every 4 days vs every 6 months). On ads, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

HAMmade GRID is free to download; DayNumCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DayNumCalc ships an update every 6 months, HAMmade GRID every 4 days. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
DayNumCalc versus HAMmade GRID: the parameters behind the verdict, then further details
ParameterDayNumCalcHAMmade GRID
Price$0.99Free — better
Rating4.8 (6 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings6 — better—
Update frequencyEvery 6 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.515.1 — better
Further details — not scored
Size1 MB18 MB
Age rating4+4+
DeveloperMayra M MartinezOguz Agceli

In-app purchases

None

DayNumCalc

No in-app purchases

None

HAMmade GRID

No in-app purchases

Questions

Is DayNumCalc free?
DayNumCalc costs $0.99, with no in-app purchases.
Is HAMmade GRID free?
HAMmade GRID is free to download, with no in-app purchases.
Do DayNumCalc or HAMmade GRID have ads?
Neither DayNumCalc nor HAMmade GRID shows ads.
Which is updated more often, DayNumCalc or HAMmade GRID?
DayNumCalc ships an update every 6 months, and HAMmade GRID every 4 days. Most recently, DayNumCalc was updated on September 29, 2026 and HAMmade GRID on October 5, 2026.

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