Comparison

$MASTR vs RandyAI

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

Head to head
About

$MASTR

This app serves as an educational companion for learning about cryptocurrency. It allows users to track their learning progress, collect daily rewards, and scan project information. Account management features are also available.

Highlights
  • Daily reward collection
  • Token activity reports
  • Daily project scanning
  • Notification management
  • Account deletion
Read full description

MASTR is a focused education companion to help you track progress and stay organized. What you can do today Daily Reward — Collect a reward once per day. Token Report — View your token activity reports and open details. Scan Project — Submit one scan per day; if you’ve already scanned, you’ll see a clear notice. Account Controls — Manage notifications and delete your account from Settings. Disclaimers MASTR provides educational information only and does not offer financial, investment, trading, or insurance services. No cryptocurrency is offered or sold. No external payment links. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.askmastr.xyz/privacy

About

RandyAI

This app helps water and wastewater professionals prepare for certification exams and understand plant operations. It offers state-specific practice questions, an AI-powered study assistant for complex topics, and troubleshooting support for equipment. Learn and retain critical concepts with interactive lessons and quizzes, accessible offline.

Highlights
  • State-specific exam preparation
  • AI-powered study assistant
  • Troubleshooting support for plant operations
  • Interactive lessons and quizzes
  • Offline mobile learning
  • Operator-developed content
Features
Read full description

RandyAI is the smart study and support app built by licensed operators to help you pass your water and wastewater certification exams, and understand real treatment plant operations like a pro. Developed by RenAIssance Labs and powered by real EPA, DEP, and WEF data, RandyAI turns complex industry knowledge into simple, interactive lessons and quizzes. Designed for operators, students, and professionals, Randy helps you learn, retain, and apply critical concepts in water and wastewater management. What RandyAI Provides: State-Specific Exam Prep: Study for your Class A – E, 1-4 certification exams with practice questions tailored to your state’s requirements. Smart Study Assistant: Ask Randy anything about treatment processes, chemistry, biology, or plant math and get clear, operator-level explanations. Troubleshooting Support: Understand how pumps, blowers, controls, and sensors actually work in the field. Randy breaks down mechanical, electrical, and process systems in plain English. Instant Feedback & Practice: Review operator-style questions, check your answers, and get explanations to help you master the reasoning behind each solution. Offline & Mobile Learning: Study anywhere — at work, home, or in the field — with lessons you can review on your phone or tablet. Built for Operators, by Operators: Every topic and question is grounded in real-world experience from licensed water and wastewater professionals. Why RandyAI Operators are the backbone of safe water. Randy helps you learn smarter, faster, and more confidently, Whether you’re just starting your certification journey or preparing for your next upgrade. Randy.ai isn’t a generic AI! he’s your study coach, your process guide, and your always-available plant mentor.

Screenshots

$MASTR4 screens
RandyAI4 screens

Verdict

The call

The clearest difference is monetization model: $MASTR at free against RandyAI's freemium. RandyAI's advantage is update cadence (every 2 months vs every 8 months) and iOS requirement (15.1 vs 17.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. $MASTR sells 3 in-app purchases, starting at $59.99 per month and RandyAI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

$MASTR ships an update every 8 months, RandyAI every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
$MASTR versus RandyAI: the parameters behind the verdict, then further details
Parameter$MASTRRandyAI
PriceFreeFree
Rating—3.9 (7 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size27 MB41 MB
Age rating4+17+
DeveloperITEAMCAREER S.R.L.RenAIssance Labs, LLC

In-app purchases

3 purchases

$MASTR

Subscriptions2
  • MASTR Pro Monthly$59.991 Month
  • MASTR Pro Quarterly$149.993 Months
One-time1
  • MASTR 1 Inquiry$4.99
2 purchases

RandyAI

Subscriptions2
  • Randy Pro - Monthly7 Days trial$4.991 Month
  • Randy Pro - Yearly7 Days trial$44.991 Year

Questions

Is $MASTR free?
$MASTR is free to download, with in-app purchases available.
Is RandyAI free?
RandyAI is free to download, with in-app purchases available.
Do $MASTR or RandyAI have ads?
Neither $MASTR nor RandyAI shows ads.
Which is updated more often, $MASTR or RandyAI?
$MASTR ships an update every 8 months, and RandyAI every 2 months. Most recently, $MASTR was updated on October 25, 2026 and RandyAI on October 24, 2026.

Other comparisons