Comparison

Metrix vs SiteCalc

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

Head to head
About

Metrix

Effortlessly convert between units and currencies as you type. Supports over 80 units across 14 categories, including international sizing and cooking measurements. Offers smart paste, compound formats, and offline currency conversion.

Highlights
  • Converts as you type
  • 80+ units and 14 categories
  • International sizing conversions
  • Offline currency exchange rates
  • Smart paste for values and units
  • Compound measurement formats
  • Customizable categories and units
Features
Read full description

You're packing a suitcase and need to know if 23 kg is over the limit. You're halving a recipe and 350 g of flour means nothing in cups. You're pricing something abroad and want it in dollars without three taps. Metrix converts as you type. No buttons. No waiting. Every row updates with every digit. 14 categories. 80+ units. 80+ currencies refreshed daily. International sizes, instantly convert shoe, clothing, ring and bra sizes between US, EU, UK and Japan. No more guessing your size when shopping abroad. Common conversions, instantly: kg to lbs, cm to inches, celsius to fahrenheit, kilometers to miles, meters to feet, grams to ounces, grams to cups, liters to ml, mm to inches, EUR to USD, GBP to USD. Type the number, every related unit updates the moment you do. Free, always • Length: cm, inches, feet, meters, miles, yards, nautical miles • Weight: kg, grams, pounds, ounces, stone, milligrams • Temperature: Fahrenheit, Celsius, Kelvin • Time: seconds, minutes, hours, days, weeks, months, years • Currency: 80+ currencies, refreshed daily, works offline • Sizes: shoe, clothing, ring and bra (US, EU, UK, Japan) • Volume: liters, milliliters, gallons, pints, quarts • Cooking: cups, tbsp, tsp. Real fractions: see 1 ¾ cups, not 1.7500 • Area: square feet, square meters, acres, hectares • Speed: mph, km/h, knots, m/s • Torque: newton-meters, foot-pounds, inch-pounds, kgf·m • Energy: joules, kJ, calories, kWh, BTU • Pressure: Pascal, kPa, bar, PSI, atm, mmHg • Digital Storage: bytes, KB, MB, GB, TB • Favorites: pin the conversions you use every day • History: every result saved, tap any row to restore What makes it different Type a calculation in any cell. 4.5 × 3.2 right where you'd type the number, see the answer in square feet instantly. No separate calculator app. Smart paste. Copy "5 feet" or "72.5 kg" from anywhere. Tap Paste. Metrix sets the unit AND the value in one move. Compound formats. See height as "5 ft 10 in" or weight as "7 lb 3 oz" alongside the decimal. The way people actually read measurements. Currency that knows where you are. Open Currency anywhere in the world and your home currency is at the top. House icon marks it. Tap any other to set a new home. Customize everything. Reorder categories. Hide ones you'll never use. Reorder units inside any category. Make Metrix yours in 30 seconds. Locale-aware. Type 2,5 in Germany or 2.5 in the US, Metrix understands both. Numbers render in your local format (1.234,56 vs 1,234.56). iPhone and iPad. Native iPad layout with sidebar + always-on calculator-style numpad. iPhone uses the system keyboard with paste + operators above it. One purchase. No subscription. No ads. No tracking. No accounts. Works fully offline (currency uses cached rates when disconnected). Who it's for • Travelers checking luggage, prices, and clothing sizes abroad • Cooks scaling recipes between metric and imperial • Engineers, students, and runners who switch systems all day • Anyone tired of asking Google "how many feet in a meter" for the hundredth time

About

SiteCalc

Features
Read full description

Professional construction calculators for electricians, roofers, carpenters, concrete and paving contractors, HVAC techs, plumbers, masons, painters, floor layers, solar installers, fencers — and the foundations, drywall and business numbers behind every job. Built for tradespeople who need accurate, fast, offline calculations on the job site. No account needed. Calculators work with no internet. FREE IN EVERY TRADE Every trade includes a starter set of full calculators, free forever — try real tools in your own trade before you pay anything. SMART TOOLS • AR Measure: tap point-to-point distances with your camera, no tape needed • Room Scan: capture a room with LiDAR and turn it into instant dimensions • Site Level: use your phone as a digital level and angle finder • Tape Calculator with saved tapes for running totals • Cost Book and reusable estimate templates ELECTRICAL • Voltage drop (NEC / BS 7671 / IEC), wire gauge with temperature and bundling corrections, conduit fill, residential load per NEC 220, ampacity lookup, motor circuit sizing BUSINESS • CAGR, APR, APY, depreciation, future value, loan and lease; cost per square foot, gross pay, effective interest • Project dates: countdowns, days overdue, work days, completion estimates, staffing ROOFING • Pitch converter, roof area (gable, hip, shed, flat), material estimator, rafter length with birdsmouth, common rafters, hip ridge CONCRETE • Volume for slabs, footings, columns and steps, bag estimator, rebar spacing and weight, slab-on-grade CARPENTRY • Board feet, stair layout (2R+T), deck boards, crown angles, plywood, floor joists, subfloor, insulation, ramps, balusters HVAC • BTU load (simplified Manual J), duct sizing, CFM by room, refrigerant charge, fan sizing, attic ventilation, window AC PLUMBING • Pipe sizing, DWV, water heater sizing, drain slope FOUNDATIONS • Footings, columns, slabs, excavation and backfill, grading, squaring, rebar MASONRY • Block walls, core fill, brick, mortar, masonry units, stone retaining walls DRYWALL • Sheets, mud, tape, screws, metal-stud framing PAINTING • Paint gallons, primer, trim, spray coverage, labour FLOORING • Tile, plank, underlayment, grout, transitions PAVING • Asphalt, asphalt parking areas, crushed stone driveways, sealer SOLAR / PV • PV array, string sizing, voltage drop, setbacks FENCING • Posts, rails, pickets, gates, post-hole concrete FEATURES • Calculators work completely offline — no internet required • Supports US (NEC), UK (BS 7671) and EU (IEC) standards • Imperial and metric with instant conversion • Save calculations to history with job names • Export professional PDF reports • Dark mode and large touch targets for gloved hands on site • VoiceOver accessible, Siri shortcuts and widgets PRICING A starter set of calculators in every trade is free forever — no account, no subscription. Own your tools with one-time purchases — no subscription required for calculators: • Trade packs — five bundles grouped by jobsite: Systems (Electrical, Plumbing, HVAC), Structure (Concrete, Foundations, Masonry), Framing & Roofing (Carpentry, Roofing, Solar), Finishes (Drywall, Painting, Flooring), Sitework & Business (Paving, Fencing, Business) • All Trades — every calculator in a single purchase • Power Tools — AR Measure, Room Scan, Site Level, Cost Book and templates, plus unlimited notes and PDF export • Pro Lifetime — every calculator and every power tool, owned outright forever SiteCalc Pro (monthly or yearly, with a 7-day free trial) adds the cloud: iCloud sync across your devices, Crew project sharing, cloud backup for photos, voice notes and scans, new code-edition updates, and Family Sharing — and includes every calculator and power tool while active. If a subscription lapses, you keep everything you bought outright. TERMS OF USE You can find EULA terms of use here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Metrix4 screens
SiteCalc4 screens

Verdict

The call

Metrix and SiteCalc are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both are free to download. Metrix sells 1 one-off in-app purchase and SiteCalc sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Metrix versus SiteCalc: the parameters behind the verdict, then further details
ParameterMetrixSiteCalc
PriceFreeFree
Rating5.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 3 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size20 MB21 MB
Age rating4+4+
DeveloperReply200 Inc.Neil Faulkner

In-app purchases

1 purchases

Metrix

One-time1
  • Metrix Pro$5.99
10 purchases

SiteCalc

Subscriptions2
  • SiteCalc Pro Monthly7 Days trial$4.991 Month
  • SiteCalc Pro Yearly7 Days trial$39.991 Year
One-time8
  • Sitework & Business Pack$14.99
  • Framing & Roofing Pack$14.99
  • Crew +5 Seats$19.99
Show 5 more
  • Power Tools$24.99
  • Crew +10 Seats$34.99
  • All Trades$49.99
  • Pro Lifetime$99.99
  • Unlimited Crew Seats$149.00

Questions

Is Metrix free?
Metrix is free to download, with in-app purchases available.
Is SiteCalc free?
SiteCalc is free to download, with in-app purchases available.
Do Metrix or SiteCalc have ads?
Neither Metrix nor SiteCalc shows ads.

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