Tank Volume Calculator vs Well Testing Suite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tank Volume Calculator
Easily calculate the volume and liquid levels for a wide variety of tank shapes. Supports multiple units and offers offline functionality for convenient use in industries or for personal projects.
- Calculate volume for vertical, horizontal, conical, elliptical, rectangular, and aquarium tanks
- Supports metric and imperial units (mm, cm, inches, feet, liters, gallons)
- Built-in volume converter
- Save and track calculations
- Offline functionality
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Tank Volume Calculator, Your go-to app for anyone needing quick and accurate volume calculations! Whether you're managing industrial tanks, measuring liquid volumes, or calculating the size of your home aquarium, this app makes it easy. From agriculture to transportation, and from water management to aquarium enthusiasts, this app supports a wide range of tank types, including vertical, horizontal, rectangular, conical, elliptical, and aquarium tanks. Key Features: • Calculate the volume of various tank types: vertical, horizontal, conical, elliptical, rectangular, and aquarium tanks. • Supports all units: mm, cm, inches, feet, liters, gallons (US & UK). • Built-in volume converter for metric and imperial (mm, cm, inches, feet, liters, gallons, etc.) • Track and save your calculations for future use. • No internet connection needed - use it anytime, anywhere. Ideal for professionals in industries such as agriculture, oil & gas, water management, transportation, and aquarium enthusiasts. Get started today - whether you're managing fuel tanks, oil storage, or ensuring the right water level for your fish tank, Tank Volume Calculator makes the job simple and efficient.
Well Testing Suite
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H2Oil Well Testing Suite is a comprehensive engineering calculator app designed for well test supervisors, field engineers, and operations teams working in oil and gas. Every calculation runs entirely on your device - no internet connection, no cloud, no subscriptions. Your data never leaves your phone. CALCULATORS INCLUDED Well Testing - AGA-3 Orifice Gas Metering (Reader-Harris/Gallagher, ISO 5167-2 / API MPMS 14.3.1) - Dual Choke Sizing (Thornhill-Craver / Economides, critical and subcritical) - Choke Flow Rates (gas, oil, multiphase) - Separator Retention Time (two and three-phase) - Bottoms Up Time / kill sheet calculations - Solution GOR (Standing 1947) - Oil and Gas Rate (surface and reservoir) - MCF and Shrinkage Flow Assurance - Well Test Simulator: full flow path from Wellhead to SSV, Choke, Heater, Separator, Flare, Surge Tank and Atmospheric Tank. Live pressure, temperature and velocity at every node. API RP 14E erosional velocity and hydrate risk at each segment. Flare and Radiation - API 521 Flare Radiation Analysis - Interactive 3D Flare Model with touch pan and pinch-to-zoom - Radiation exclusion zones mapped to API 521 Table 5 thresholds - 2D Radiation Contour Map Reservoir Engineering - Decline Curve Analysis: Arps, Duong, Stretched Exponential with P10/P50/P90 EUR Safety - PRV Sizing (API 520 Part I) REPORTING Every calculator exports a professional PDF report including your company logo, client logo, well and field details, engineer name, and full results. Reports save directly to the Files app via the iOS share sheet. PNG and CSV exports also available. DESIGNED FOR FIELD USE - Fully offline - no Wi-Fi or cell signal required on location - Dark theme optimised for outdoor readability - Large touch targets and haptic feedback - All data stored locally with iCloud-eligible backup WHO IS IT FOR Well test supervisors, petroleum engineers, production engineers, drilling engineers, HSE engineers, and operations personnel who need fast, reliable engineering calculations on location without a laptop. Developed by H2Oil Engineering - well testing and engineering services. Contact: software@h2oil.co.uk
Screenshots
Verdict
The clearest difference is update cadence: Well Testing Suite at every 3 weeks against Tank Volume Calculator's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Tank Volume Calculator ships an update every 10 months, Well Testing Suite every 3 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Tank Volume Calculator | Well Testing Suite |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 10 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Bestami Oktay Akpinar | H2Oil Limited |
In-app purchases
Tank Volume Calculator
No in-app purchases
Well Testing Suite
No in-app purchases
Questions
Is Tank Volume Calculator free?
Is Well Testing Suite free?
Do Tank Volume Calculator or Well Testing Suite have ads?
Which is updated more often, Tank Volume Calculator or Well Testing Suite?
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