Bottoms Up Calcs icon
ChartBrew icon
Combine Fluids icon
+2

GoodStamp

For oil and gas field professionals (engineers, rig crews) and tabletop RPG game masters requiring specialized calculation or organization tools.

5apps2.7(1.2K) Multi-theme

Snapshot

Who is GoodStamp?

Providing specialized utility calculators and scheduling tools for niche industrial professionals and tabletop gaming enthusiasts.

Target audience

OilGas field professionals (engineersRig crews)

Active nemesis

Aliasgar Rangwala

Other rivals

Portfolio

5
apps
Utilities3
Entertainment1
Productivity1

Last updated

Oilfield Calendar

v1.4

6.9y ago

Steady

Publisher DNA

What defines GoodStamp?

Publisher DNA

Primary focus

Specialized industrial utilities and niche productivity tools

Scale

indie

Target audience

Oil and gas field professionals (engineers, rig crews) and tabletop RPG game masters requiring specialized calculation or organization tools.

Origin

Operates under the brand Archimedes Workshop.

Signature Patterns

  • •Focus on high-utility calculation tools for technical and industrial professions.
  • •Monetization via upfront paid models rather than ad-supported or subscription frameworks.
  • •Support for industry-specific standards, including API and Metric unit systems.
  • •Functional, minimalist UI design optimized for rapid data entry in field environments.
Steady

Portfolio momentum

Maintained a steady cadence with 3 releases across 5 apps in the last 6 months, focusing on updating core industrial utilities.

Last release 134d agoActive apps 3Abandoned 2

Portfolio

What does GoodStamp ship?

Apps

5 apps analysed

  • Industry-specific calculation logic creates high switching costs for petroleum engineers
ChartBrew icon
ChartBrew

Build, edit & roll tabletop RPG charts for D&D, Pathfinder & TTRPGs.

0.0
Combine Fluids icon
Combine Fluids

FLUID is the app designed to simplify the work of drivers during the loading phase

3.7(3)
Mud Weight icon
Mud Weight

Mud Weight Calculations in API and Metric Units and Well Volume calculations

3.0(2)

PDF-sharing mechanism creates organic referral loops

  • Specialized hitch-editor interface anchors daily retention

Single-market publisher, every app ships only to United States.

Based on 2 of 5 apps with localized market data, more coverage rolling in as scans complete · last scanned .

Americas (1)

  • United States2 / 2

Core markets (2/2 apps)

United States

Rivals

Who does GoodStamp compete with?

The rivals identified

Nemeses(2)

Aliasgar Rangwala

known forOilField HandyCalc Lite

2 apps0.0ProductivityUtilities

Both apps target the same niche oilfield workforce, forcing a choice between specialized work-rotation scheduling and technical petroleum engineering calculations.

Theta Oilfield Services

known forOilfield Calculator - Pump Slippage

1 app0.0Utilities

Both apps target oilfield professionals requiring specialized downhole calculations, creating direct competition for the same niche user base.

Same space(23)

Ahmad Suleiman

known forOilfield Calculator Pro

1 app0.0Utilities

Offers a comprehensive toolkit for petroleum engineers, encompassing the same well control and tank volume calculations.

App Star Family

known forShift Work Calendar

1 app0.0Productivity

Addresses the same shift-scheduling needs by allowing users to visualize work patterns and sync with partners.

Ash Point

known forPump Rate Calculator

1 app0.0Utilities

Automates pump operation tracking, serving the same oilfield technicians who use Bottoms Up Calcs for wellbore data.

Ashvin Kevadiya

known forTank Volume Calculation

1 app4.7Utilities

Serves the same industrial calculation audience but focuses on tank geometry rather than downhole oilfield parameters.

AtomApplications

known for2026 Calendar Launcher

1 app4.4Productivity

Provides a home-screen-integrated scheduling tool that competes for the same daily-utility slot on a user's device.

ATPM TECHNO

known forSMART Oil Field Calculation

1 app0.0Utilities

Offers a range of field calculations for planning and drilling, directly serving the same oilfield professional audience.

Bestami Oktay Akpinar

known forTank Volume Calculator

1 app4.7Utilities

Provides similar volume arithmetic for industrial storage, competing for the same professional user base in oil and gas.

Brett Munson

known forWater Well Calculator

1 app0.0Utilities

Provides volume calculations for water wells, serving a niche segment of the industrial liquid storage market.

Dairy App & Notes & Audio Editor & Voice Recorder

known forCalendPal: Calendar Planner

1 app4.5Productivity

Serves as a generalist agenda planner that competes for the same daily organizational utility as Oilfield Calendar.

Kelly Gayneaux

known forVolume in Pipe

1 app5.0Utilities

Provides specialized volume estimates for pipes and vessels, directly serving the same oil and gas field personnel.

Komorebi

known forSimple Calendar - easy planner

1 app4.8Productivity

Provides a general-purpose scheduling tool that offers similar basic event-tracking functionality to Oilfield Calendar.

Kosuke Hamada

known forShift Planning Calendar

1 app4.7Productivity

Appeals to the same shift-worker demographic by providing a simple, ad-free tool for managing work hours.

LRHSoft

known forWork Shift Calendar

1 app4.6Productivity

Directly competes for the shift-worker demographic by offering automated shift tracking and income calculation tools.

michael heinz

known forRoster-Calendar

1 app4.4Productivity

Targets shift workers with a template-based approach to scheduling that mirrors the utility of Oilfield Calendar.

MyBuzz Technologies

known forMy Shift Planner - Calendar

1 app4.8Productivity

Targets the same shift-worker audience but uses a freemium model to gate advanced features like calendar sync.

Paul Femiak

known forPetroleum Field Calculator

1 app0.0Utilities

Acts as a portable reference for upstream oil and gas calculations, overlapping with the core utility of Bottoms Up Calcs.

Prometheus Interactive

known forCalendar 2026: Simple Calendar

1 app4.7Productivity

Offers a generalist alternative for personal scheduling that lacks the specialized hitch-editor interface of Oilfield Calendar.

Snappii

known forOilfield Pipe Volume app

1 app1.0Utilities

Targets the same oilfield pipeline operators but provides a broader suite of data sharing and sync features.

Solid Apps S.R.L.

known forSolid Calendar

1 app4.9Productivity

Provides a subscription-free alternative for professionals and shift-workers that competes with the paid-upfront model of Oilfield Calendar.

TimeTree

known forTimeTree: Shared Calendar

2 apps4.7Productivity

Serves the same family-coordination need as Oilfield Calendar but targets general households rather than industry-specific rotations.

ToonBoon

known forCalendar

1 app4.4Productivity

Functions as a general agenda planner that overlaps with the basic event-tracking needs of Oilfield Calendar users.

Valaji Global

known forTank Volume Calculator App

1 app1.0Utilities

Offers similar geometric volume calculations for industrial tanks, overlapping with the professional utility segment.

zhandos uakanov

known forAnnular Volume Calculator

3 apps0.0Utilities

Directly addresses the same niche as Bottoms Up Calcs by calculating volumes between pipes or holes.

The Analyst's Read

The bottom line on GoodStamp

Bottom line

GoodStamp is a disciplined niche publisher that successfully monetizes high-intent professional users through specialized paid utility apps. Their strength lies in domain-specific logic that creates high utility for industrial workers in the oil and gas sector.

Frequently asked questions

How many apps does GoodStamp publish?
GoodStamp has 5 apps tracked by Marlvel, primarily in the Utilities category.
What kind of apps does GoodStamp make?
GoodStamp's portfolio is concentrated in Utilities and Entertainment, with an average rating of 2.7/5 across rated apps.
What is GoodStamp's top app?
By review volume across the portfolio, Oilfield Calendar is GoodStamp's best-known app tracked by Marlvel.
In how many countries are GoodStamp's apps available?
Marlvel has tracked GoodStamp's apps across 1 country.

What fed this analysis

Apps analyzed:
5
With full intel:
1
With overview:
5
Website scraped:
yes
Social presence:
no

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by GoodStamp, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Cite this report

Marlvel.ai. “GoodStamp intelligence.” Updated 2026-04-24. https://marlvel.ai/publishers/goodstamp

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Data licensed under CC-BY-NC 4.0