StopTime

StopTime helps technical professionals analyse stopping time from video and calculate separation distances. It processes recordings on the device and retains results, assumptions and evidence in verifiable sessions. LEARN AND CONSULT THE ARCHIVE A technical library in Italian and English, examples, glossary, quizzes and 25 interactive plates. Learn and consultation of archived sessions remain free after a subscription expires. BASE: MEASURE AND CALCULATE Import original high-speed videos or record with a compatible Android camera. Enter machine details, including with local OCR from a nameplate photo. Follow the guided workflow, define analysis regions, check events and compare repetitions. Results distinguish measured time, uncertainty and the conservative declared value. Ten calculation tools include formulas, steps, warnings and PDF worksheets. EN ISO 13855 editions 2010 and 2024 remain explicitly separate. Complete standards tables are not reproduced: cases requiring their values refer to the original sources. Available high-speed profiles depend on the phone; 240 fps is not guaranteed. Internal recording has no audio. The acoustic trigger uses an imported original with a synchronised audio track. Two-phone mode requires a common flash visible in both originals. SESSION REPORT A single unlock covers printing and exporting the report for one session and its repetitions, including subsequent reprints and exports of the same archive. It does not activate Measure or Calculate. PDF, JSON, CSV and evidence packages retain event images, uncertainty budgets and SHA-256 file digests. UNLIMITED Includes Base features and reports for any session, with no limit on measurements. The first export during the subscription records entitlement for that session, retained after expiry except for refunds or revocations linked to the purchase. Every export requires an online entitlement check. PURCHASES AND RECOVERY Google Play displays duration, localised price, renewal and any trial before confirmation. Trials are available only on Base plans for eligible accounts. Subscriptions renew automatically; management and cancellation are available through Google Play. Unlimited has no trial. Keep an encrypted backup: it contains the data and pseudonymous identity needed to recover entitlements on another installation. The Google account alone does not recreate the StopTime identity. A purchase does not restore deleted files. iOS data and purchases do not transfer automatically. DATA AND TIMESTAMPS No named StopTime account. The commercial service verifies technical identifiers and transactions with Google Play without receiving recordings or reports. After acceptance of the terms, measurement evidence automatically generates timestamp requests: Sectigo and FreeTSA receive SHA-256 digests, technical data and IP addresses, not files. Tokens remain separate from originals. Google Play Billing and ML Kit send diagnostics to Google; OCR photos and recognised text remain local. No advertising or commercial profiling. REPORTS AND RESPONSIBILITY Every report is an UNVALIDATED TECHNICAL DRAFT. It does not certify the machine or include professional verification or signature by Carlo Tenca or CE4U. StopTime is not a calibrated instrument and does not replace a risk assessment. No qualified signature, qualified timestamp or PDF/A compliance is promised. Support: [email protected].