ArchitectScaler vs Model Scale Calculator
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ArchitectScaler
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ArchitectScaler turns your iPhone and iPad into a scale ruler, a drafting calculator, and the small toolbox of conversions architects, designers, and students actually reach for. No triangular ruler, no clunky calculator, no "calculate" button - you type, and the answer is already there. Version 2.0 opens on a Home screen of tools. Tap one and you are working. THE CONVERTER Set a scale once, then keep a live ledger of dimensions. Type a real-world length to get the drawing length, or type a drawing measurement to get the real thing - both directions, instantly. Name any row ("North wall", "Door", "Site") so a list of numbers reads as a list of things. Your rows, scale, and units are saved between launches. FEET AND INCHES, PROPERLY Type 12'-6 1/2" the way you would write it. Scales like 1/4" = 1'-0" are first-class, and a keyboard row puts the ' " - and / marks one tap away. Change a unit and the app converts the value rather than re-reading the same digits. THE TOOLS Find scale from a drawing - measure any labeled dimension on a print and get the ratio back, with the nearest named scale offered as a one-tap match. Slope and pitch - convert between 1:20, percent, degrees, and roof pitch, and get the fall over a run. Area and volume - scale squared and cubed, from square millimeters through hectares and square inches through acres, plus cubic meters, feet, and yards. Rescale and print - the copier percentage that takes a drawing from one scale to another, and what a line measures after the change. Sheet fit - whether a plan fits a sheet inside its margins, and the largest named scale that would. ISO A0 to A4, ANSI A to E, and Arch A to E1. Feet and inches - add and subtract lengths in drafting notation without converting to decimal first. Scale bar - generate a printable graphic scale and share it straight into a drawing. Model making - turn a real wall thickness into the nearest card, foam board, or acrylic sheet, and see how far off that substitution puts you. BUILT FOR THE WAY YOU WORK Metric and imperial: mm, cm, m, km, in, ft. Metric, architect, and engineering scale presets, or type any ratio you like - 1:48 and 1:37.5 are both fine. iPhone and iPad. Light and dark, following your system appearance. No account, no ads, no tracking, no data collection. Every calculation stays on your device. Built by an architect, for architects, interior designers, engineers, students, model makers, and anyone who works from a scaled drawing.
Model Scale Calculator
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A scale converter for people who build models. Pick a scale โ HO, N, O, 1:35 armour, 28mm heroic, 1/4" = 1' โ type a dimension, and read the answer as you type. Free, offline, no account, no ads. THREE ANSWERS, ONE SCREEN โข Real โ model โ how big is a 40-foot boxcar in HO? โข Model โ real โ this part measures 92 mm; what is that full size? โข What scale is this? โ give a real length and the model length it has to come out at, and get the ratio. COMPARE ACROSS SCALES A second view takes one measurement and shows it in every scale in a hobby group at once โ model railway gauges, military armour, aircraft, tabletop miniatures โ with a proportional bar per row so you can judge the sizes by eye instead of reading numbers. UNITS HOBBYISTS ACTUALLY TYPE It parses what you would write on a workbench note: 250mm, 2.5 cm, 5' 6", 5ft 6in, 1 1/2", 3/4", 1-1/2". Feet-and-inches and fractional inches are first-class output formats, not an afterthought โ fractions come back as fractions, rounded to the precision you choose. SCALES INCLUDED โข Model railways โ Z, N, TT, HO, OO, S, O, G and more โข Military and armour โ 1:16, 1:35, 1:48, 1:72 โข Aircraft โ 1:32, 1:48, 1:72, 1:144 โข Cars โ 1:18, 1:24, 1:43, 1:64 โข Tabletop and wargaming โ 15mm, 28mm heroic, 32mm, 54mm โข Architecture โ imperial drawing scales like 1/4" = 1' and metric 1:50, 1:100 โข Any custom ratio you type WORKS COMPLETELY OFFLINE No account, no sign-in, no sync, no paywall and no advertising. Every calculation happens on your device, and nothing you type is ever sent anywhere. The only thing the app ever sends is anonymous usage data โ which scales and modes get used โ and you can switch that off in Settings. For model railroaders, scale modellers, miniature painters, RC builders, dollhouse makers, architects and anyone who has ever stood in a hobby shop doing long division on their phone.
Screenshots
Verdict
ArchitectScaler and Model Scale Calculator are too close to call on the numbers: across 5 compared parameters โ price, ads, in-app purchases and device support among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ArchitectScaler | Model Scale Calculator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 14 months | โ |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 โ better |
| Further details โ not scored | ||
| Size | 3 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Pratheek Balakrishna | Harbor Apps LLC |
In-app purchases
ArchitectScaler
No in-app purchases
Model Scale Calculator
No in-app purchases
Questions
Is ArchitectScaler free?
Is Model Scale Calculator free?
Do ArchitectScaler or Model Scale Calculator have ads?
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