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22
BU Score
Niche

Architect's Formulator

2.0 ✍️ Editor
✍️ BU Analytics Review

Architect's Formulator is an iOS app from Historycentral.com in the Business category, currently rated 2.0★ across 2 ratings. Initial signal reads as mixed reviews — supporters praise core features while critics cite stability/value gaps.

Our BU Score puts it at 22Niche (micro-niche or pre-traction stage). For a Business app, that means micro-niche or pre-traction stage.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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idle
0%
Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
0
since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Below-average rating (2.0★)METRIC
−$1,500
Mature app (17y old)METRIC
+$1,500
Single-language (English only)METRIC
−$400
Pre-traction phase (2 ratings)METRIC
−$300
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 36 MB🔞 4+📱 iOS 18.6+🔖 v5.02🔄 updated 1mo ago🌐 EN📂 Business💰 Paid🚀 Launched 2009 (17y old)

📝 About this app

ARCHITECT'S FORMULATOR is the ultimate professional calculator for architects,
engineers, and construction professionals — with over 2,000 formulas in a
single app.

Whether you're sizing beams, designing HVAC systems, calculating voltage
drops, or checking ADA compliance, Architect's Formulator covers every
discipline — structural, electrical, mechanical, plumbing, and carpentry —
plus unit conversions, reference tables, and ADA accessibility resources.

ARCHITECTURE & STRUCTURAL — 29 categories covering beam loads across single
through four continuous spans, concrete design, flat plate analysis, steel
design, masonry, environmental loads (wind, snow, seismic), foundation and
retaining walls, wood design, acoustic absorption, 100+ material weights, fire
egress, roof drainage, solar/daylighting, thermal performance, site grading,
cost estimating, and more.

ELECTRICAL — 15 categories for AC/DC circuits, Ohm's Law, motors,
transformers, voltage drop, wiring/conduit sizing, batteries, impedance, power
demand, lighting design, UPS sizing, and operating costs.

CARPENTRY — 8 categories for lumber, stairs, safe beam loads, wall loads,
roofing (shed, gable, hip), railing/deck framing, crown molding, and materials
estimation for drywall, concrete, paint, and plywood.

PLUMBING & HVAC — 29 categories covering pipe sizing, water flow, pumps,
boilers, and a comprehensive HVAC library including airside/waterside heat
transfer, duct sizing, fan and pump laws, gas laws, psychrometrics,
refrigeration, heating/cooling load design, energy content for 16 fuel types,
ventilation rates per ASHRAE 62.1, and steam/hydronic systems.

CONVERSIONS — 17 categories with 500+ conversions for pressures, flows, BTU,
horsepower, watts, frequency, linear/liquid/square/cubic measures, weights,
and a Metric library with 280+ conversions across length, area, volume, mass,
energy, power, and more.

TEMPERATURE SCALES — Convert between all 8 scales: Celsius, Fahrenheit,
Kelvin, Rankine, Réaumur, Newton, Delisle, and Rømer.

REFERENCE TABLES — IBC Occupancy Loads, Brick Sizes, Lumber Dimensions, AWG
Wire Gauge, Concrete Mix Ratios, and Insulation R-Values.

ADA REFERENCE — 50 illustrated diagrams for wheelchair clearances, ramps, grab
bars, elevators, accessible parking, and restroom layouts, plus 17 PDF
documents with full ADA guidelines.

FEATURES:
• Over 2,000 professional formulas
• US and Metric units with one-tap switching
• Save and export calculations
• Favorite your most-used calculators
• One-time premium upgrade — no subscriptions

From foundation to finish, every formula for every phase of the job.

🆕 What's New · v5.02

Minor bug fixes

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
Architect's Formulator
Developer
Historycentral.com
Bundle ID
net.multieducator.Architecture
App Store URL
Open in App Store
Category
Business
Content rating
4+
Languages
EN

Company

Website
www.historycentral.com
Tagline
The Best Source of American and World History
Description
American and World History all in one place.All of Americas Wars, different periods in American history. Special sections on elections, civics, the Navy, railroads, aviation. Everything you want to know about history
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
Not found

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$144/mo
Top-grossing rank
Outside top 100 in US Business
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
https://www.historycentral.com/News.html
Press / News
Not found

Contacts & Socials

Socials
youtube
Email
Not found
Phone
1400-1899 20
Contact page
https://www.historycentral.com/Contact.html
About page
https://www.historycentral.com/About.html
📈Ratings growth2 ratings+100% lifetimeShow 3-year history estimate ▾Apr 2009Aug 2024May 2026
Tracked (8 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

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