# Fill Safe — Tank Volume Calculator

> Tank Volume Calculator (iPhone/iPad app by Benjamin Lee.)

- Source: https://appshunter.io/ios/app/fill-safe/id6757569781 (this page in markdown: same URL + `.md`)
- Developer: [Benjamin Lee](https://appshunter.io/developer/1867644803)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 49 MB
- Languages: American English
- Released: 2026-01-12
- Data updated: 2026-09-29
- User reviews in markdown: https://appshunter.io/ios/app/fill-safe/id6757569781/reviews.md

## What is Fill Safe?

Fill Safe is a modern, driver‑focused tool that streamlines fuel delivery workflows with accurate calculations, QR‑powered tank identification, and clean digital delivery slips. Designed for real‑world field conditions, Fill Safe replaces handwritten paperwork with a fast, consistent, and professional mobile experience.
Whether you’re delivering fuel, tracking tank levels, or managing customer locations, Fill Safe helps reduce errors, improve safety, and simplify your daily workflow.

Features
QR‑Powered Tank Identification
Scan a tank’s QR code to instantly load preset dimensions, customer details, and product information. Each scan generates a QR‑linked invoice, ensuring every delivery is tied to the correct tank and location without manual entry.
Accurate and Safety‑Focused Calculations
Fill Safe includes a built‑in geometry engine that estimates tank volume using real measurements. Clear inputs, automatic conversions, and structured data entry help reduce mistakes and support safer delivery decisions.
Instant PDF Delivery Slips
Create clean, professional delivery slips with:
• 	Customer and site information
• 	Tank dimensions and product details
• 	Start/stop measurements
• 	Driver notes
• 	Digital signatures
• 	QR invoice ID for traceability
Share PDFs instantly with billing, dispatch, or customers.
Driver‑Friendly Workflow
Fill Safe is built for speed and clarity:
• 	Large, readable inputs
• 	Simple step‑by‑step flow
• 	Automatic field population
• 	Light and dark mode support
Optimized for use in trucks, yards, and job sites.
Preset Library
Save tank presets for quick repeat deliveries. Each preset stores dimensions, product type, customer location, and a linked QR code.
Signature Capture
Collect customer or driver signatures directly on the device. Signatures are embedded into the PDF for clean, audit‑ready documentation.
Offline‑Ready
Scan QR codes, enter measurements, and generate slips even without service. Share them later when you’re back online.

Why Fill Safe
Fuel delivery often depends on handwritten notes and inconsistent documentation. Fill Safe brings accuracy, consistency, and professionalism to every delivery:
• 	Reduce errors
• 	Improve billing accuracy
• 	Standardize documentation
• 	Speed up driver workflow
• 	Enhance safety through accurate calculations
• 	Create clean digital records tied to QR‑linked invoices
Built with real drivers and real workflows in mind, Fill Safe helps you deliver with confidence.


## Version history (last 5 releases)

### 1.0.11 — 2026-02-13

merged code for fill safe pro and fill safe. bringing all of fill safe pros features into fill safe for free with ads.
qr code delivery system
weight calculator
additive calculator
import export presets

### 1.0.5 — 2026-01-23

added preset sorting- by name and by capacity
added more detailed documentation in the tips tab
cleaned up the UI
added some upgrade modals and upgrade buttons
added partners tab
added logo and splash screen

### 1.0.4 — 2026-01-19

fixed crash/bug
added instructions for using the app

### 1.0.2 — 2026-01-16

-added the ability to export tank presets
-preset imports reserved for fill safe pro
-made some updates to UI

### 1.0 — 2026-01-12

No release notes.

## Apps similar to Fill Safe

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Tank Volume Calculator A1 PRO](https://appshunter.io/ios/app/tank-volume-calculator-a1-pro/id6759477456) | — | Free | Productivity |
| [Tank Volume Calculation](https://appshunter.io/ios/app/tank-volume-calculation/id6740401902) | — | Free | Productivity |
| [Blue Stakes of Utah 811](https://appshunter.io/ios/app/blue-stakes-of-utah-811/id1546902857) | — | Free | Productivity |
| [SMARTank](https://appshunter.io/ios/app/smartank/id1131690300) | 2.5 (17) | Free | Productivity |
| [DCI DigiGuide](https://appshunter.io/ios/app/dci-digiguide/id1442290201) | 4.7 (12) | Free | Productivity |
| [Schlage Mobile Access](https://appshunter.io/ios/app/schlage-mobile-access/id1505710549) | 4.7 (3,878) | Free | Productivity |

## More apps by Benjamin Lee

- [Fill Safe Pro](https://appshunter.io/ios/app/fill-safe-pro/id6757570824)

All apps by Benjamin Lee: https://appshunter.io/developer/1867644803

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*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 2026-09-29.*