Comparison

iCrucible vs StarLoc

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

Head to head
About

iCrucible

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iCrucible is an AI tool for Materials Science. Using this app, you can learn about how AI tools work for materials screening, and may discover candidate compounds. Learn more at our website: https://www.rimcs.co.jp/ iCrucible makes a prediction of a ternary system on your iPhone or iPad without external services, using graph neural networks and crystal prototype databases bundled in the app. You can watch the phase diagram redrawn at the end of each stage during performing the prediction task. Note that it is the phase diagram at absolute zero (i.e., 0 kelvin) and around zero pressure (i.e., 0 kilobar). Performance It takes a few seconds to minutes depending on the creation settings and your device. The app has a multithreading option to accelerate the core of the AI tool - for example, computationally intensive tasks are sped up around 2.5x on M1 iPad Air. Chemical System A chemical system is selected by choosing three unique chemical elements from: • Element List (with group and period restriction) or • Periodic Table Materials Screening The materials screening is conducted by thresholding two values: • Predicative Variance • Stability (Energy above Convex Hull) Phase Diagram Drawing The drawing is customizable and responsive with useful features: • Formula Labeling • Stability Thresholding • Zoom • Mark Size • Font Size • Balloon with each compound information Confidence Chart The chart shows the distribution of predicative confidences, and provides an overall confidence of the system prediction and the phase diagram. Compound Table The table shows stable and metastable compounds with stabilities and predicative confidences, from which you can easily choose candidate compounds. Settings You can set the default preferences of the chemical system creation and the phase diagram drawing in the App's Settings. The entrance of the In-App Shop is also located in the App's Settings. We offer Free, Standard, and Premium plan. You can subscribe to one of Standard and Premium plan at the In-App Shop. The Shop's Help describes the system tiers used for the content management. Free features: • Free Elements: H to Ar. (*) • Ensemble Size: M = 1. • Prototype Database: Small only. • You can take a note about each chemical system to not forget any novel findings and great ideas. Standard features: • Standard Elements: K to Xe. (*) • Ensemble Size: M is not more than 5. • Prototype Database: Small, Medium, and Large. • You can sort chemical systems into Stocks that are a storage for them. • Chemical systems can be shared between your devices by peer-to-peer Wi-Fi networking. Premium features: • Premium Elements: Cs to Pu except Po to Ra. (*) • Ensemble Size: M is not more than 10. • Prototype Database: all scales, that is, Small, Medium, Large, and Huge. • Multithreading can be used to accelerate the core of the AI tool - for example, computationally intensive tasks are sped up around 2.5x on M1 iPad Air. * Noble gas elements are not available. Flame Gems You need flame gems for a non-free system creation, and can buy them at the In-App Shop. The Shop's Help describes how to consume flame gems and has the cost calculator. You have to buy no flame gems if you are on the Free plan. Terms of Use: http://www.apple.com/legal/itunes/appstore/dev/stdeula

About

StarLoc

This app provides precise GPS coordinates, altitude, and time data in a night-friendly interface for astronomers. It offers essential information for telescope alignment and observation, with a focus on preserving night vision.

Highlights
  • Night-friendly dark theme
  • Accurate latitude and longitude (DMS)
  • Decimal coordinate support
  • Real-time GPS updates
  • Local, UTC, and offset time
  • Elevation in meters and feet
  • Horizontal and vertical accuracy
Features
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StarLoc is a clean, distraction-free GPS tool designed specifically for stargazing. Get accurate latitude, longitude, altitude, and time in formats ready for telescope alignment all in a night-friendly interface. Built for the Night Sky 
• Unlike standard GPS apps, StarLoc uses a dark theme with red and green text to help preserve your night vision during astronomy sessions. Accurate Location Data • Latitude & Longitude (DMS format) 
• Decimal coordinates for quick entry 
• Real-time GPS updates 
• High-accuracy positioning data 
 Time & Alignment Ready • Local time (12-hour & 24-hour) 
• UTC time and offset 
• Date display for precise telescope setup Altitude & Accuracy 
• Elevation in meters and feet 
• Horizontal and vertical accuracy readings Simple, focused and reliable. StarLoc provides the essential data you need to align your telescope and start observing. Perfect for backyard astronomers and dark-sky explorers alike.

Screenshots

iCrucible4 screens
StarLoc3 screens

Verdict

The call

The clearest difference is in-app purchases: StarLoc at none against iCrucible's 8. StarLoc also leads on update cadence (every 2 months vs every 5 months). On price, ads, device support and iOS requirement 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. iCrucible sells 8 in-app purchases, starting at $2.99 per month. StarLoc asks for nothing beyond the download.

UpkeepUpdate frequency

iCrucible ships an update every 5 months, StarLoc every 2 months. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
iCrucible versus StarLoc: the parameters behind the verdict, then further details
ParameteriCrucibleStarLoc
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPad — betteriPhone
Requires iOS17.217.0 — better
Further details — not scored
Size172 MB2 MB
Age rating4+4+
DeveloperRIMCS LLCDaniel Schaich

In-app purchases

8 purchases

iCrucible

Subscriptions4
  • Standard$2.991 Month
  • Premium3 Days trial$4.991 Month
  • Standard$29.991 Year
Show 1 more
  • Premium$49.991 Year
One-time4
  • 500 Flame Gems$4.99
  • 2,500 Flame Gems$23.99
  • 5,000 Flame Gems$46.99
Show 1 more
  • 10,000 Flame Gems$91.90
None

StarLoc

No in-app purchases

Questions

Is iCrucible free?
iCrucible is free to download, with in-app purchases available.
Is StarLoc free?
StarLoc is free to download, with no in-app purchases.
Do iCrucible or StarLoc have ads?
Neither iCrucible nor StarLoc shows ads.
Which is updated more often, iCrucible or StarLoc?
iCrucible ships an update every 5 months, and StarLoc every 2 months. Most recently, iCrucible was updated on October 5, 2026 and StarLoc on October 16, 2026.

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