Comparison

Kharty vs Robi Lab

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

Head to head
About

Kharty

Transform learning into an engaging game by quizzing yourself on maps and diagrams. Create custom study materials or explore a vast catalog. Master subjects through a progressive learning method, track your progress, and challenge others.

Highlights
  • Create custom diagrams
  • Multiple game modes
  • Progressive learning method
  • Track best records
  • Dictation of terms
  • Share creations
  • Offline study
Features
Read full description

NEW Kharty AI. Say what you want to learn, Kharty creates a game for you! Kharty turns learning maps and diagrams into an exciting game! Choose from our catalog or easily create your own with AI. Quickly master any diagram with Kharty’s progressive learning method! Main Features: - Download or create your own diagrams - Multiple and engaging game modes - Progressive learning - Track and beat your best records - Dictation of terms in many languages - Share your creations with friends, students and the community - Study offline Kharty is free to download. To play and create, you need a Kharty+ subscription, monthly or yearly (the yearly plan starts with a 7-day free trial). Kharty+ includes 10 AI Khartys a month; more are available as separate in-app purchases. No more staring at textbooks, learning is now a game to have fun with: As terms are displayed and dictated, locate them in the illustration before time runs out and don’t make errors to beat your own records. Master what you’re studying and challenge your friends! Download diagrams, maps or charts: Browse the gallery for any subject, from geography and anatomy to history and vocabulary. Create your own: It couldn’t be easier, just pick an image and add in your terms, all right within the app. In no time, your new diagram will be available to study with all game modes provided by Kharty. Play and share your creations with anybody: friends, students, classmates or the entire Kharty community! Progressive learning: Don’t get overwhelmed by complex diagrams, our method makes it easy by focusing on a few terms at a time. As you master each term, more will be added, with checkpoints to ensure maximum retention. You’ll surprise yourself with how much and how fast you learn! Help us improve! Send us your feedback and diagram suggestions: contact@kharty.com Terms of Use (EULA): https://www.kharty.com/en/tos Privacy Policy: https://www.kharty.com/en/privacy

About

Robi Lab

Features
Read full description

Robi Lab teaches coding, robotics, math, science, and artificial intelligence to kids ages 5 to 12, through challenges they solve by playing. A PATH, NOT A MENU Five worlds with six levels each. Every challenge unlocks the next, and every level mastered earns a certificate. Kids always know what comes next. ADAPTS TO THEIR AGE The same challenge changes with age: at 5 they learn by tapping, with no text; at 11 it brings bigger boards, obstacles, and more steps. THE FIVE WORLDS • Coding: sequences, turns, loops, conditionals, functions, variables, debugging, and binary. • Math: counting, the four operations, fractions, place value, telling time, money, measurement, and data. • Robotics and electronics: series and parallel circuits, sensors, logic gates, and current simulators. • Science: forces, matter, the human body, health, ecosystems, Earth and the Universe, and the scientific method. • Artificial intelligence: how an AI learns, data, bias, vision, language, and ethics. LEARNS AND REMEMBERS If a skill isn't there yet, Robi leaves a practice challenge on the map; if it's mastered, a harder bonus challenge. And it schedules reviews days later so what they learned sticks. IN ENGLISH AND SPANISH The whole app, including all 1,228 challenges, is complete in both languages: each child plays in the one they choose. ALIGNED TO THE CURRICULUM Every challenge is anchored to a skill in Ecuador's General Basic Education curriculum and to international frameworks: Common Core, NGSS, and the UNESCO AI competency framework. FOR FAMILIES AND SCHOOLS One adult account for the whole family; each child has their own profile and signs in without a password. Schools get a teacher dashboard with each student's progress. PRIVACY No ads and no tracking. The camera, used only by a few challenges, analyzes the image on the device and never stores or sends it. The account and all its data can be deleted from the app. FAMILY PLAN Monthly or yearly subscription that renews automatically; the price for your country is shown before you buy. Cancel anytime in Settings › your name › Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms and Conditions: https://robilab.app/terminos Privacy: https://robilab.app/privacidad

Screenshots

Kharty4 screens
Robi Lab4 screens

Verdict

The call

The clearest difference is ads: Robi Lab at none against Kharty's shown. Robi Lab also leads on update cadence (daily vs every 3 days). On price, in-app purchases, 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. Kharty sells 9 in-app purchases, starting at $3.99 per month and Robi Lab sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Kharty ships an update every 3 days, Robi Lab daily. The most recent releases landed on November 2, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Kharty versus Robi Lab: the parameters behind the verdict, then further details
ParameterKhartyRobi Lab
PriceFreeFree
Rating4.8 (205 ratings) — better—
Positive reviews95.2% of reviews—
Number of ratings205 — better—
Update frequencyEvery 3 daysDaily — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size84 MB22 MB
Age rating4+4+
DeveloperKharty LLCLEVANTNET CONSULTING S.A.S.

Bugs and requests

Kharty

Reported bugs

10 issues
  • Premium version performs worse
  • App doesn't dictate terms
  • Timer malfunctions
  • App stops functioning well mid-study
  • Cannot search on iPhone 15
Show 5 more
  • Cannot add students
  • Error when sending pin to students
  • Country missing from list (Sahara Occidental)
  • Incorrect information (manganese vs magnesium)
  • App asks for all rivers when specific ones are chosen

Requested features

8 requests
  • Add more languages (especially Portuguese)
  • Add mathematics content
  • Wider study criteria
  • Time limit or study schedule
  • Quick review option
Show 3 more
  • More advanced diagrams for anatomy
  • More idioms available
  • More languages and math

Robi Lab

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Kharty

Subscriptions6
  • Kharty + Monthly (Student)$3.991 Month
  • Kharty + Monthly (Teacher)$3.991 Month
  • Kharty PRO Monthly (Teacher)7 Days trial$19.991 Month
Show 3 more
  • Kharty + Annual (Teacher)7 Days trial$29.991 Year
  • Kharty + Annual (Student)7 Days trial$29.991 Year
  • Kharty PRO Annual (Teacher)1 Month trial$149.991 Year
One-time3
  • 3 AI Khartys$2.99
  • 10 AI Khartys$6.99
  • 25 AI Khartys$14.99
2 purchases

Robi Lab

Subscriptions2
  • Family Plan monthly$3.991 Month
  • Family Plan yearly$29.991 Year

Questions

Is Kharty free?
Kharty is free to download, with in-app purchases available.
Is Robi Lab free?
Robi Lab is free to download, with in-app purchases available.
Do Kharty or Robi Lab have ads?
Kharty shows ads; Robi Lab does not.
Which is updated more often, Kharty or Robi Lab?
Kharty ships an update every 3 days, and Robi Lab daily. Most recently, Kharty was updated on November 2, 2026 and Robi Lab on October 29, 2026.

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