HP Prime Lite vs help
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HP Prime Lite
This app provides advanced graphing calculator functionality on your mobile device. It offers features for solving equations, exploring mathematical concepts, and is ideal for students in secondary and collegiate math courses. Enjoy a familiar layout with powerful tools for problem-solving.
- Advanced graphing of equations and inequalities
- Solve single and systems of equations
- Hundreds of mathematical functions
- Context-sensitive help
- Computer Algebra System (CAS)
- Pinch-to-zoom and multi-touch
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HP Prime Lite is an introductory graphing calculator app that enables users to solve problems, learn, and explore on their mobile device. Designed with a similar layout to the College Board approved HP Prime Graphing Calculator, the app allows for flexible functionality. FEATURES: · Advanced graphing capabilities of implicit and explicit equations and inequalities, with the ability to trace or build tables of points of interest. · Perfect companion for secondary and collegiate mathematics courses · Just-in-time context-sensitive help built into the app · Solve single equations and systems of equations (linear and nonlinear) · Hundreds of mathematical functions and commands available for quick and easy problem solving · Pinch-to-zoom and multi-touch capabilities · Reduce keystrokes with optional Reverse Polish Notation (RPN) · Customizable for individual user preferences · Delivers a multidimensional Computer Algebra System (CAS) · Authentic app, developed and supported by HP
help
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The Roof Framing Help Desk app/Bot is designed to serve as a knowledge base for roof framing techniques and to calculate rafter angles and rafter lengths. It can calculate the rafter angles for equal-pitched, unequal-pitched, and polygon roofs, such as Octagon roofs. It is also a knowledge base for roof framing. Enter a keyword like 'irregular hip roof,' and it will provide you with a link to a web page with explanations on cutting an irregular hip roof. Or enter a keyword like devioement-hip shift, and it will provide you with a link to a webpage for devoiement. Or how to lay out a hip rafter precisely. It will calculate rafter angles and rafter lengths. There are currently over 300 keywords to search the knowledge database. Over 800 drawings explaining different roof framing techniques, as well as 150 new webpages of information for the keywords in the knowledge database. If you have a webpage, PDF file, or YouTube video you would like to share, you can add it to the knowledge database. The main concept of the knowledge database is to make it similar to Wikipedia, except for roof framing techniques. Menu selection Live Knowledge Database-> Search the Live database on our server Static Knowledge Database-> Database is locally stored and not updated Irregular Hip Roof Calculator-> Returns all the calculations to cut an irregular hip roof Number of Risers-> Simple stair rise height-riser count calculator Submit New Keywords -> Submit new keywords to be added to the Database Books on Geometry -> Books on Geometry, Stereotomy, Trigonometry, Roof Framing Posters & Study Resources -> PDF file links Settings -> Control screen animations Use the built-in rafter length calculator for irregular hip roofs. Include the hip rafter offset calculations for equal overhang. Example results for the Irregular Hip Roof Rafter Calculator: Roof Eave Angle: 90 Main Pitch: 8.0 Adjacent Pitch: 11.0 Main Slope: 33.69007 Adjacent Slope: 42.51045 Main Plan Angle: 53.97263 Adjacent Plan Angle: 36.02737 Hip Rafter Slope: 28.33166 Main Backing Angle: 19.04187 Adjacent Backing Angle: 33.12606 Hip Rafter Width 3.5 Hip Rafter is not Shifted Main Backing Depth 19/32" Adjacent Backing Depth 1 1/8" Main Plumb Line Shift 1 9/32" Adjacent Plumb Line Shift 2 13/32" Hip Rafter Length: 168 9/16" Hip Rafter Length To Ridge: 167 17/32" Hip Rafter SBBA at Ridge: 36.02737 Main Rafter Run: 120" Main Rafter Length: 144 7/32" Main Rafter Length To Ridge: 143 5/16" Adjacent Rafter Run: 87 9/32" Adjacent Rafter Length: 118 3/8" Adjacent Rafter Length To Ridge: 117 3/8" Rise: 80" Rise To Ridge: 79 1/2" Top of Ridge: 79 1/2" + HAP Main Purlin Miter Angle: 21.97005 Main Purlin Bevel Angle: 29.30039 Adjacent Purlin Miter Angle: 42.89582 Adjacent Purlin Bevel Angle: 36.59559 Main Roof Sheathing Angle: 58.82 Adjacent Roof Sheathing Angle: 44.61 Jack Rafter Spacing: 16.0 Main Jack Rafter Length Difference: 26 7/16" Main Jack Rafter SBBA: 53.97263 Main First Jack Rafter Length: 24 3/32" Adjacent Jack Rafter Length Difference: 15 25/32" Adjacent Jack Rafter SBBA: 36.02737 Adjacent First Jack Rafter Length: 13 19/32" Valley Sleeper SBBA: 37.83207 Valley Sleeper Offset: 1 5/32" For Equal Overhang Roofs Using Hip Rafter Offset Over Hang Run 12.0 Hip Rafter Offset From Corner 4 1/2" Offset Wall Plate Rise 3" Main Rafter Run 120" Adjacent Rafter Run 84" Offset Wall Plate Length 115 1/2" Adjacent Rafter Length 113 15/16" Adjacent Hip Rafter Run 142 13/16" Adjacent Hip Rafter Length 162 1/4" Adjacent Hip Rafter Length To Ridge 161 13/32" Main Jack Rafter at Corner Theoretical 5 13/32" Main Jack Rafter at Corner Long Point 4 5/16" Main First Jack Rafter Long Point 29 1/2" Adjacent First Jack Rafter Long Point 13 19/32" Main Overhang Rafter Length 14 13/32" Adjacent Overhang Rafter Length 16 9/32" Hip Rafter Overhang Rafter Length 23 3/16" Here's a link to the help files https://www.raftertools.com/bot/index.html
Screenshots
Verdict
The clearest difference is price: HP Prime Lite at Free against help's $9.99. HP Prime Lite also leads on iOS requirement (12.0 vs 26.0). help's advantage is update cadence (every 5 days vs every 8 months). 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
HP Prime Lite is free to download; help costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HP Prime Lite ships an update every 8 months, help every 5 days. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.
| Parameter | HP Prime Lite | help |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 3.6 (42 ratings) — better | — |
| Positive reviews | 47.8% of reviews | — |
| Number of ratings | 42 — better | — |
| Update frequency | Every 8 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 42 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | MORAVIA Consulting, spol. s r.o. | Sim Ayers |
In-app purchases
HP Prime Lite
No in-app purchases
help
No in-app purchases







