Comparison

Steam Worx vs Obius

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Steam Worx

This application assists engineers and technicians with complex fluid dynamics calculations. It provides tools for sizing and selecting pressure relief valves, control valves for steam and water, and heat exchangers. The app also includes calculators for pipe sizing, noise levels, and unit conversions.

Highlights
  • Pilot-Operated PRV Sizing
  • Control Valve Sizing (Steam & Water)
  • Heat Exchanger Sizing
  • Pipe Sizing & Velocities
  • Noise Level & Cavitation Calculations
  • Unit Conversions
Features
Read full description

The Steam Worx app is your complete resource for: o Pilot-Operated PRV Sizing & Selection o Control Valve Sizing for Steam & Water o Full models codes for Watson McDaniel HD & HB Series Valves o Heat Exchanger Sizing o Pipe Sizing and Velocities o Noise Levels and Cavitation Calculations o Noise Attenuation & Anti-Cavitation Adapter Design o Steam Calculators o Comprehensive Unit Conversions

About

Obius

This app offers a visual workspace for organizing notes and ideas. It allows for reusable content blocks, color-coded sections for intent, and AI-powered features for content generation and semantic search. It prioritizes privacy with local-first storage and end-to-end encryption.

Highlights
  • Visual workspace for notes and ideas
  • Reusable content blocks (Loops)
  • Color-coded sections by intent
  • AI-powered content generation and search
  • Version history and snapshots
  • Offline functionality and end-to-end encryption
Features
Read full description

Obius — Notes that evolve. Designed for the way you think. Your ideas don't arrive in straight lines. Obius is a visual workspace where notes carry color, ideas connect to each other, and what you wrote yesterday folds into what you're building today. Built for founders, PMs, designers, researchers — and anyone who outgrew Apple Notes but never quite fit into Notion. LOOPS — WRITE ONCE, REUSE EVERYWHERE Drop a Loop into any note — a named, reusable content block like @launch_checklist or @weekly_review. Edit it in one place, every copy updates instantly. Perfect for running lists, shared context, and anything you reference more than once. SECTIONS THAT CARRY MEANING Every section has an intent — a color that tells you at a glance what kind of thinking lives there. Open ideas, questions you're sitting with, work in motion, issues to fix, things that are done. Five colors. Five intents. Your thinking, visible. — Drag and drop to reorder — Collapse, expand, and nest sections — Rich content: text, checklists, code, quotes, images, audio — Tap once to change a section's intent ECHOES — REMINDERS THAT BRING THE NOTE BACK Attach a time-based reminder to any Loop. Unlike calendar pings, an Echo resurfaces the full note when the moment matters — with all its context intact, not a one-line nag. OBIUS INTELLIGENCE AI that lives inside the workspace, not in another tab. — Generate full pages from a single prompt — Edit, rewrite, and refine content in place — no copy-pasting between apps — Smart titles that actually describe the page — Semantic search that finds ideas, not just keywords — Research context: pull what you need, paste, and think from there INSIGHTS THAT SURFACE WHAT MATTERS Obius watches your pages for patterns so you don't have to. Cleanup suggestions, related notes you forgot about, lists hiding in your text, and safety flags for leaked credentials or secrets. VERSION HISTORY, BUILT IN Every note quietly snapshots itself. Browse the timeline, restore any earlier version, watch your thinking evolve over time. No save button. No lost work. SHARE LIVE OR FROZEN Generate a short public link to share a live note that updates as you edit — or freeze a snapshot in time. Readable URLs. View counts. Comments optional. CALENDAR See your work across time. Plan ahead, look back, stay oriented — without leaving Obius. LOCAL-FIRST. PRIVATE BY DEFAULT. — Pages stored on your device first — Works fully offline; syncs when you reconnect — End-to-end encrypted sync — No tracking. No selling data. Not now, not ever. — Optional local-only mode for maximum privacy YOUR MIND. YOUR ARCHITECTURE. Obius isn't another notes app. It's a workspace shaped like thinking — simple enough to start in seconds, deep enough to grow with how you actually work. Designed for the way you think. Terms of Use (EULA): https://docs.google.com/document/d/e/2PACX-1vRq_bt_Z_V7ci7lS3hHLzq4QjRrDFJsJu6Ab-oedeeSakGPGcx_dJlG3EDAzdetptd21GPyEtzTxKbg/pub Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vRbJ9cYTWnyQSYeL8JrTOizC0eC-f8rhoicqh3GttTDIrbNlesR-_auwkFz2OLsTTzguDG3YLtzwnEY/pub

Screenshots

Steam Worx4 screens
Obius4 screens

Verdict

The call

The clearest difference is in-app purchases: Steam Worx at none against Obius's 4. Steam Worx also leads on iOS requirement (15.0 vs 17.0). Obius's advantage is update cadence (weekly vs every 2 months). On price, rating, ratings volume and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Obius sells 4 in-app purchases, starting at $4.99 per month. Steam Worx asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Steam Worx against 5.0 for Obius. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Steam Worx ships an update every 2 months, Obius weekly. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 5 level
Steam Worx versus Obius: the parameters behind the verdict, then further details
ParameterSteam WorxObius
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Number of ratings2 — better1
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size18 MB23 MB
Age rating17+4+
DeveloperWatson McDaniel CompanyDemetri Hodges

Customer experience

Steam Worx

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Obius

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Steam Worx

No in-app purchases

4 purchases

Obius

Subscriptions3
  • Obius Pro Founder$4.991 Month
  • Obius Pro Monthly$9.991 Month
  • Pro Annual$79.991 Year
One-time1
  • Power Pack$9.99

Questions

Is Steam Worx free?
Steam Worx is free to download, with no in-app purchases.
Is Obius free?
Obius is free to download, with in-app purchases available.
Which has better reviews, Steam Worx or Obius?
Steam Worx and Obius are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Steam Worx or Obius have ads?
Neither Steam Worx nor Obius shows ads.
Which is updated more often, Steam Worx or Obius?
Steam Worx ships an update every 2 months, and Obius weekly. Most recently, Steam Worx was updated on September 30, 2026 and Obius on October 5, 2026.

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