# Bunker Stem: Fuel Calculator — BDN & MFM Delivery Proof > Offline evidence workspace for bunker fuel delivery proof and analysis. (iPhone/iPad app by Dmitriy Motorin.) - Source: https://appshunter.io/ios/app/bunker-stem-fuel-calculator/id6777398984 (this page in markdown: same URL + `.md`) - Developer: [Dmitriy Motorin](https://appshunter.io/developer/1495533596) - Category: Business, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 9 MB - Languages: English - Released: 2026-06-16 - Data updated: 2026-07-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/bunker-stem-fuel-calculator/id6777398984/reviews.md ## What is Bunker Stem? Bunker Stem is an offline bunker fuel calculator and evidence workspace for receiving-side delivery. Calculate quantity, estimate ROB, check BDN/MFM figures, record samples, seals, photos and remarks, and preview a local Evidence Pack PDF before the vessel sails. Use it when a bunker operation needs a neutral local record before signing, sharing, or disputing delivery evidence. Core workflows: - Bunker fuel quantity computer with visible inputs, normalized values, method, rounding and warnings. - Voyage / ROB planning estimate for practical bunker planning. - BDN checklist for supplier, fuel grade, density, observed volume, delivered quantity, sulphur note and photo state. - Stem workspace with status, supplier/barge fields, surveyor, ETA, samples, seals, eBDN verification reminder and discrepancy review. - Singapore-first port context with source/version visibility and manual override. - Fuel Library with offline source/version audit. - PDF preview generated locally before export access. - StoreKit export access for sharing, archiving and repeat professional use. Transparency stays free. Calculations, audit views, source assumptions and PDF preview are available before export access. Paid access is for exporting, sharing and archiving the Evidence Pack. Bunker Stem does not require login, cloud sync or a live network connection for the active workflow. Public data pack values are handled as source-backed assumptions; user-entered BDN, MFM, lab and price evidence remains authoritative. Bunker Stem is not an eBDN issuance platform, supplier marketplace, purchasing system or live bunker price service. It is built as a receiving-side proof layer for crews, surveyors, port agents and operators who need to understand what happened during delivery. Important: Bunker Stem is a practical workflow and evidence organization tool. It does not replace professional judgment, contractual review, class requirements, regulatory advice or official measurement procedures. Privacy Policy: https://metacad.io/bunkerstem/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Offline evidence workspace - Bunker fuel quantity computer - BDN checklist - Stem workspace with status - Local Evidence Pack PDF preview - StoreKit export access ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Annual Export Access | $149.99 | per year | | Monthly Export Access | $19.99 | per month | ## Frequently asked questions about Bunker Stem ### What is Bunker Stem used for? Bunker Stem is an offline evidence workspace designed for bunker fuel delivery. It helps users record and manage delivery figures, samples, photos, and remarks to create a local evidence pack. ### Is Bunker Stem free to use? Yes, core workflows like calculations, audit views, source assumptions, and PDF preview are available for free. Paid access is required for exporting, sharing, and archiving the Evidence Pack. ### Does Bunker Stem require an internet connection? No, Bunker Stem does not require login, cloud sync, or a live network connection for its active workflow. It is designed to function offline. ### What are the subscription options for Bunker Stem? Bunker Stem offers Monthly Export Access for $19.99/P1M and Annual Export Access for $149.99/P1Y. The annual plan includes a 3-day free trial. ### What kind of evidence can be recorded in Bunker Stem? Users can record BDN and MFM figures, samples, seals, photos, and remarks. It also includes a checklist for supplier, fuel grade, density, and delivered quantity. ### Can I issue eBDNs or purchase fuel through Bunker Stem? No, Bunker Stem is not an eBDN issuance platform, supplier marketplace, purchasing system, or live bunker price service. It focuses on providing a receiving-side proof layer. ### What devices does Bunker Stem support? Bunker Stem is supported on iPhone and iPad devices. ### How often is Bunker Stem updated? The latest version, 1.3, was last updated on June 29, 2026. Specific update frequency is not detailed, but it is actively maintained. ## Version history (last 4 releases) ### 1.4 — 2026-07-20 Improved reliability across bunker calculations, evidence review, PDF preview and export on iPhone and iPad. ### 1.3 — 2026-06-29 Clearer App Store listing and screenshots for bunker fuel delivery evidence. ### 1.0.1 — 2026-06-18 Clearer App Store listing and screenshots for bunker fuel delivery evidence. ### 1.0.0 — 2026-06-16 No release notes. ## More apps by Dmitriy Motorin - [Minute Notes](https://appshunter.io/ios/app/minute-notes/id1495533597) - [Earbuds Locator- Device Finder](https://appshunter.io/ios/app/earbuds-locator-device-finder/id1495817993) - [Get Tan: УФ и таймер загара](https://appshunter.io/ios/app/get-tan/id1496553189) - [Awesome Filters - Photo Editor](https://appshunter.io/ios/app/awesome-filters-photo-editor/id1499982722) - [Weight Loss Yoga for Beginner](https://appshunter.io/ios/app/weight-loss-yoga-for-beginner/id1502548881) All apps by Dmitriy Motorin: https://appshunter.io/developer/1495533596 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-27.*