HotPaw Basic vs N+Chroma
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HotPaw Basic
Experience retro computing by typing and running Basic programs on your iPhone or iPad. This app functions as a programmable calculator and can display simple line graphics, Morse code audio, and perform FFT analysis.
- Retro text-mode Basic interpreter
- Programmable calculator functionality
- Simple line graphics display
- Morse Code audio output
- FFT analysis
- GPS location support
- MQTT and BTLE communications
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Calling all early-personal-computing fans, remember typing Basic programs into your home computer? HotPaw Basic recreates the retro-experience of a text-mode Basic interpreter, and it runs right on your iPhone or iPad. You can also use HotPaw Basic as a programmable calculator, or for displaying simple line graphics. The HotPaw Basic interpreter supports the minimal Basic language, including: Commands: let if then else endif dim data read restore for to step next while wend goto gosub return ? print input open close end stop mat run new list del save load dir cls rem Functions: int() abs() sgn() rnd() sqr() exp() log() log10() sin() cos() tan() atn() len() val() asc() str$() chr$() hex$() mid$() timer() date$ time$ pi Operators: + - * / mod ^ = and or xor not Also includes new command and functions to support line graphics, Morse Code audio, FFT analysis, GPS location, MQTT and BTLE communications. Line numbers are required. Type in the text of your program and type "run" to run them. See: http://www.hotpaw.com/rhn/basic/iphone/ for a more complete description of the Basic language syntax, commands and functions which this Basic interpreter supports.
N+Chroma
Scan real-world colors using a specialized sensor and view their numerical data in various formats. Save scanned colors to collections for later comparison and analysis under different lighting conditions.
- Scan colors with Chroma-NODE sensor
- Display color information (RGB, HEX, L*a*b*, CMYK)
- Store scanned colors in collections
- Compare scanned colors numerically
- View color data in D65 and D50 lighting
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HARDWARE REQUIRED: N+Chroma color sensor from variableinc.com PLEASE NOTE: This application requires an iPhone 4s (or newer) or an iPad 3 (or newer), or an iPad Mini, and a NODE sensor device with a Chroma module. Please see our website at www.variabletech.com for more information. The Chroma App will let you scan colors using the Chroma – NODE sensor, and displays the color information on the screen. Great for getting color information off of real world objects! Chroma provides numerical color information in: RGB, HEX, L*a*b*, and CMYK formats. The color graphic displayed on iOS device is an approximate representation of the color scanned. Exact color information can only be attained by the numerical color information. Additionally, scanned colors are stored to the user’s collections to be looked up later, or used for comparison in the Compare Color View (where you can scan colors into left and right view to get a numerical comparison of the colors). The Chroma app also enables the user to view color information in both D65 and D50 lighting environments to make using colors in other applications or web design quick and simple. Please note that for this application to run, the user must have a NODE module sensor from Variable Technologies along with a Chroma color sensor module. About NODE: NODE is a patent-pending wireless sensor platform capable of measuring, recording, and transmitting a wide array of sensor data. NODE is a Bluetooth Smart device, using the latest low energy Bluetooth standard to communicate sensor data to Bluetooth Smart Devices such as the Apple iPhone 4s, Apple iPhone 5, Apple iPad3, and Apple iPad Mini.
Screenshots
Verdict
The clearest difference is price: N+Chroma at Free against HotPaw Basic's $4.99. N+Chroma also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (9.1 vs 12.3). HotPaw Basic's advantage is rating (3.9 vs 3.4) and review sentiment (52% vs 33%). On ratings volume, 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
N+Chroma is free to download; HotPaw Basic costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HotPaw Basic holds the better App Store score, 3.9 against 3.4. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews point the same way: 52% of HotPaw Basic's written reviews are positive against 33% of N+Chroma's.
HotPaw Basic ships an update every 5 months, N+Chroma every 2 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.
| Parameter | HotPaw Basic | N+Chroma |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.9 (7 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 52.4% of reviews — better | 33.3% of reviews |
| Number of ratings | 7 — better | 5 |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.3 | 9.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | HotPaw Productions | Variable Technologies LLC |
Customer experience
HotPaw Basic
N+Chroma
In-app purchases
HotPaw Basic
No in-app purchases
N+Chroma
No in-app purchases









