Comparison

Randomize vs iCrucible

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

Head to head
About

Randomize

Generate random numbers within a specified range. Assign custom rules to each number for personalized outcomes. The app supports Voice Over for accessibility and offers multiple ways to generate new numbers, including shaking the device.

Highlights
  • Number range setting
  • Customizable rules per number
  • Shake to generate
  • Voice Over support
  • Tap to generate
Features
Read full description

- Set a range of numbers - Tap the button to get a new number - Add rules for each number you wish - Shake the app to get a new number - Voice Over support

About

iCrucible

Read full description

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

Screenshots

Randomize3 screens
iCrucible4 screens

Verdict

The call

The clearest difference is in-app purchases: Randomize at none against iCrucible's 8. Randomize also leads on update cadence (every 3 weeks vs every 5 months). iCrucible's advantage is ads (none vs shown). On price, 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. Randomize asks for nothing beyond the download.

UpkeepUpdate frequency

Randomize ships an update every 3 weeks, iCrucible every 5 months. The most recent releases landed on September 9, 2026 and December 24, 2025 respectively.

Scorecard3 real differences · 6 level
Randomize versus iCrucible: the parameters behind the verdict, then further details
ParameterRandomizeiCrucible
PriceFreeFree
Rating5.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS16.0 — better17.2
Further details — not scored
Size7 MB172 MB
Age rating4+4+
DeveloperLuis Genaro Arvizu VegaRIMCS LLC

In-app purchases

None

Randomize

No 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

Questions

Is Randomize free?
Randomize is free to download, with no in-app purchases.
Is iCrucible free?
iCrucible is free to download, with in-app purchases available.
Do Randomize or iCrucible have ads?
Randomize shows ads; iCrucible does not.
Which is updated more often, Randomize or iCrucible?
Randomize ships an update every 3 weeks, and iCrucible every 5 months. Most recently, Randomize was updated on September 9, 2026 and iCrucible on December 24, 2025.

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