StrengthGate DC Terms of Use

Effective date: June 17, 2026

StrengthGate DC is an offline field aid from Anvilfield for staging a concrete release using a site-validated ASTM C1074 maturity curve and the Nurse-Saul or Arrhenius maturity method. By installing or using the app you agree to these terms.

Field aid only — not acceptance, not a release authority

StrengthGate DC is a calculation and record aid. It is not the engineer of record, not a structural design, and not acceptance of concrete. Maturity does not replace standard-cured acceptance cylinders under ACI 318; standard-cured acceptance cylinders govern. A RELEASE result is a staging aid only: the named engineer of record authorizes the actual strip, load, or lift. A HOLD result must be resolved by the responsible authority; do not override it. Stripping or loading green concrete is a life-safety decision that remains with qualified site personnel and the engineer of record.

Your responsibility

You are responsible for all inputs, the validity of the maturity curve, logger placement and calibration, threshold selection, field judgment, and any required legal or engineering review. Anvilfield provides the app "as is," without warranty, and is not liable for decisions made using its output.

Offline records

The app stores job and pour names, mix and curve data, break pairs, logger serials, logged temperatures, thresholds, verification records, release evidence, settings, and generated export file paths on your device. Exports are field records created by you and shared only when you choose an Android share target.

Purchases

The free tier runs the maturity engine for one mix, three pours, manual readings, and one release PDF. Pro unlocks additional mixes and pours, CSV import, the Arrhenius method and editable constants, the hours-to-threshold projection, the verification log, and full release, curve, and CSV export. Pro is $4.99/month, $39.99/year, or $99 lifetime through Google Play Billing. Subscriptions renew until canceled in Google Play. Purchases are handled by Google Play Billing; Anvilfield does not receive your pour or concrete data.

Contact

Email [email protected] for terms or support questions.

Last updated: June 17, 2026.