Chalk vs Feet Inch Fractions Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chalk
This construction calculator handles metric and imperial units seamlessly, offering specialized tools for various trades like framing, tiling, and concrete work. It features an AI advisor for job guidance and works offline, ensuring accessibility on any job site.
- Metric and imperial unit support
- Specialized trade calculators (stairs, rafters, concrete, etc.)
- AI Advisor for job guidance
- Offline functionality
- Adjustable fraction precision
- Saved projects
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Chalk is the construction calculator that speaks your units. Metric first, flawless in feet and inches, and every result shown in both so nothing on site gets lost in translation. Type measurements the way you say them. The purpose-built keypad takes 5 ft 3 1/2 in one line, with one-tap fraction keys or 2.45 m, or even a mix of both. No more converting in your head, no more decimal-feet guesswork. THE TOOLBOX • Stairs — risers, going, stringer length, angle and code check • Rafters & Roof — common and hip/valley lengths from span and pitch • Concrete — slabs, footings and post holes, with bag counts • Framing & Studs — stud counts and plate lineal for any wall • Drywall — sheets, screws, compound and tape • Tiling — tiles, adhesive and grout, waste included • Brick & Block — UK, AU and US sizes, plus mortar • Decking — board rows, lineal length and fixings • Board Feet — lumber volume and cost • Equal Spacing & Balusters — even layouts that meet code • Aggregates — gravel, sand, soil and asphalt by volume and tonnes • Running Measurements — layout tables from a start and interval • Chalk Pad — a full-size dimensional calculator with memory and rafter keys • Plus a tape calculator, triangle solver, area & volume, pitch & slope, square check and a full unit converter ASK THE ADVISOR Chalk's AI Advisor talks the job through — quantities, materials, layout and sequencing. Attach a saved project and it works with your exact numbers. (The Advisor needs a connection; every calculator stays 100% offline.) BUILT FOR THE SITE • Works fully offline — no signal, no account, no ads • Clear diagram on every calculator • Saved projects keep every number with the job it belongs to • Adjustable fraction precision down to 1/64″ • Rounded, glanceable results you can read in the sun MADE FOR Carpenters, builders, concreters, bricklayers, renovators and serious DIYers — anywhere metric and imperial meet. Chalk Pro unlocks all trade calculators and saved projects. Subscriptions renew automatically until cancelled. Estimates only — always verify quantities before ordering. Privacy: https://chalkcalc.com/privacy Terms: https://chalkcalc.com/terms Support: support@chalkcalc.com
Feet Inch Fractions Calculator
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Onsite Math is a tape measure calculator for feet, inches and fractions. Add, subtract, multiply and divide job dimensions exactly, down to 1/64 inch, with metric shown alongside. FREE, NEVER LOCKED: the feet-inch-fraction calculator and unit converter. PRO offers monthly, yearly or lifetime access. No ads, no account. Works offline. CALCULATE LIKE YOU MEASURE • Add, subtract, multiply and divide feet, inches and fractions such as 7 7/8 • Choose precision from 1/2 to 1/64 inch; decimal inches and decimal feet work too • See mm, cm, m and decimal feet at the same time; area in ft² and yd², volume in ft³ and yd³ • A running tape that is kept between launches and can be saved to a job • Calculator memory: M+, M− and MR TRADE TOOLS • Stair layout: risers, treads, total run, stringer length, headroom and stairwell opening • Roof pitch, rise and run, angle and diagonal, plus common rafter length, overhang and birdsmouth cuts • Equal spacing for balusters, pickets and posts • Miter and compound crown molding angles • Board feet and repeat cuts, circle and arc, architectural and metric plan scale • Concrete (choose your bag size), drywall, tile, paint, lumber, roofing, block and rebar estimates with waste allowance, your currency and a cost per bag, sheet or piece • Fractions like 7 7/8 are accepted in every tool field BUILT AROUND REAL JOBS Save any result from any tool to a named job, keep a material takeoff and export a PDF job report with the material purchase list for your client, crew or records. Job data stays on your device. FLEXIBLE PRO ACCESS Choose a monthly or yearly auto-renewing subscription, or buy lifetime access once. Restore purchases on your other iPhone and iPad with the same Apple Account. Always verify measurements, structural requirements, codes and material specifications before ordering or cutting. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: Feet Inch Fractions Calculator at 17.0 against Chalk's 26.0. On price, 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
Both are free to download. Chalk sells 2 in-app purchases, starting at $2.99 per 7 days and Feet Inch Fractions Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Chalk | Feet Inch Fractions Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | — | Every 3 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Lionary LLC | EUTOPIX LABS |
In-app purchases
Chalk
- Chalk Pro Weekly$2.997 Days
- Chalk Pro Yearly$17.991 Year
Feet Inch Fractions Calculator
- Onsite Math Pro — Lifetime$39.99





