Pixel Density Calculator vs Arsenal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pixel Density Calculator
Calculate the pixels per inch (PPI) or dots per inch (DPI) for any display. This tool helps determine screen resolution based on dimensions and pixel count, also calculating screen size, aspect ratio, and megapixels.
- Calculate Pixels Per Inch (PPI)
- Calculate Dots Per Inch (DPI)
- Determine screen size
- Calculate aspect ratio
- Megapixel count calculation
- Shape preview
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Pixel Density Calculator are used for calculating pixels per inch (PPI) or dots per inch (DPI) of any display based on its dimensions and the pixel count. PPI is a measure of pixel density or resolution of a monitors, smartphones, tablets, smart watches, computer screen, notebooks, television screen or other display device. Pixels per inch indicates how many pixels are in a 1 inch line on a display. Also calculated are screen size, screen width, screen height, aspect ratio and total number of megapixels. Calculation including shape preview. The formula to calculate PPI from diagonal: PPI = √(w² + h²)/d where: d – Diagonal screen size in inches. w – Number of pixels along the horizontal line. h – Number of pixels along the vertical line. Calculate the number of pixels that fit on the diagonal: d = √(w² + h²) where: w - Number of pixels along the horizontal line. h - Number of pixels along the vertical line. Then, calculate the PPI as the ratio between the number of pixels along the diagonal and the diagonal screen size: PPI = d/di where di is the diagonal screen size in inches. Pixels per Inch Quality value 120 PPI - Low 120-160 PPI - Medium 160-213 PPI - Medium High 213-240 PPI - High 240-320 PPI - eXtra High 320-480 PPI - eXtra x2 High 480-640 PPI - eXtra x3 High What is pixel density: Pixels per inch (PPI) are a measurement of the pixel density (resolution) of devices in various contexts: typically computer LCD or OLED displays, image scanners, and digital camera image sensors. The PPI of a computer display is related to the size of the display in inches and the total number of pixels in the horizontal and vertical directions. The PPI and DPI definitions are essentially equivalent. Dots per inch, or DPI, is comparable to pixels per inch. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Arsenal
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ARSENAL is a private, on-device tracker for your firearms collection. No accounts, no cloud, no data leaving your phone — just a fast, focused log of everything you own. Your whole collection, organized Catalog firearms, ammunition, and accessories with the details that matter — caliber, serial, condition, value, and photos. Everything cross-links: open a rifle and see the ammo you have on hand for it and the optics mounted to it. Range log that works for you Log every range trip with rounds fired, location, and notes. ARSENAL subtracts the rounds from your ammo inventory automatically, so your counts stay honest and low-stock alerts actually mean something. Never miss a cleaning Set a round-count threshold and ARSENAL flags any firearm that's due for cleaning. Keep a full maintenance history — cleanings, repairs, parts, and inspections — for every gun. Built for the details • NFA item tracking — tax stamp number, trust or individual, approval date • Loadouts — save a firearm with its accessories and ammo as a ready kit • Ammo inventory with per-caliber low-stock alerts • Dashboard with collection value, round counts, and what needs attention Private by design Your data is stored only on your device. Lock the app behind a PIN, and export a full backup whenever you want. Nothing is uploaded, ever. Own your records Export your entire collection to CSV or JSON for insurance, estate planning, or your own recordkeeping — and import it back anytime. ARSENAL is an organizational tool, not a legal record of ownership or compliance. Always follow the firearm, ammunition, and NFA laws that apply where you live. What's New (for the first release) Welcome to ARSENAL. Track firearms, ammo, and accessories; log range trips and maintenance; set low-stock and cleaning alerts; save loadouts; and keep it all private on your device.
Screenshots
Verdict
The clearest difference is price: Arsenal at Free against Pixel Density Calculator's $2.99. Pixel Density Calculator's advantage is iOS requirement (13 vs 15.1). On ads, in-app purchases 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
Arsenal is free to download; Pixel Density Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Pixel Density Calculator | Arsenal |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 38 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 — better | 15.1 |
| Further details — not scored | ||
| Size | 3 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Heng Jia Liang | Justin Den Hartog |
In-app purchases
Pixel Density Calculator
No in-app purchases
Arsenal
No in-app purchases
Questions
Is Pixel Density Calculator free?
Is Arsenal free?
Do Pixel Density Calculator or Arsenal have ads?
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