Concrete calculations, contractor-grade.
17 calculators. Slabs to mortar. Built bilingual for the field.
A bilingual iOS calculator built for contractors, masons, and serious DIY pros. 17 calculators — slabs, footings, walls, mortar, rebar, aggregate, asphalt, and more. Works offline. No account required.
What you get
17 calculators
From slab to mortar to mix design.
Bilingual
English and Spanish, switch instantly.
Bag count, by brand
Quikrete, Sakrete, Cemex yields built in.
Offline-first
Works without internet, no account needed.
Save jobs Pro
Name them, attach photos, sync across devices.
PDF estimates Pro
Branded with your company name. One tap.
Estimate-only
Every calc shows the formula. Verify with your supplier or engineer before ordering.
No tracking
No IDFA, no behavioral ads, no PII in analytics.
Bilingual at launch
EN + ES from day one. PT + IT in v1.1.
Pricing
The Free tier includes all 17 calculators, every formula, EN + ES, and works fully offline.
Pro Annual
$19.99/year
7-day free trial · Save 44% vs monthly
- Save unlimited jobs
- Photo attachments
- PDF export + branding
- Cloud sync (all devices)
Pro Monthly
$2.99/month
Cancel anytime
- Save unlimited jobs
- Photo attachments
- PDF export + branding
- Cloud sync (all devices)
Frequently asked questions
How accurate are Concreto's calculations?
Concreto applies industry-standard formulas (volume × density, bag yield) with a configurable waste factor. Every result is an estimate — verify with your supplier or engineer before ordering.
Is Concreto free?
Yes. The Free tier includes all 17 calculators with full math, unit conversion, and a recent-5 history — no account required, works offline. Pro ($2.99/month or $19.99/year with 7-day free trial) adds saved jobs, photos, PDF exports, and cloud sync.
Can I use Concreto in Spanish?
Yes. Concreto is bilingual at launch — switch between English and Spanish in Settings. Numbers, units, and calculator copy all localize.
Does Concreto work without internet?
Yes. The Free tier runs entirely on-device — no account, no network. Pro features that sync (jobs, photos, account) need a connection, but core calculators work offline regardless of tier.
Which bag brands does Concreto support?
Concreto includes published yields and nominal prices for Quikrete (40/60/80 lb), Sakrete (40/60/80 lb), and Cemex (25/40 kg). You can override prices in the advanced cost breakdown (Pro).