Comparison

AStars vs STRATA

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

Head to head
About

AStars

This revision tool uses a card-stack interface for quick learning and an AI chat to explain difficult questions. It also provides access to a vault of past exam papers.

Highlights
  • Swipe to study interface
  • AI-powered question explanation
  • Past paper vault
  • Exam revision tool
  • Intuitive card stack
Read full description

Ready for a study app that doesn't put you to sleep? Meet AStars, the revision tool designed for speed, style, and serious results. Why you’ll love it: Swipe to Study: Breeze through questions with our intuitive card stack interface. Smart AI Chat: Stuck on a tough question? Our AI breaks it down instantly. Past Paper Vault: Access and filter years of question papers in seconds. Your exams are closer than you think. Get the edge today.

About

STRATA

This app transforms any subject into a comprehensive, structured learning course in seconds. It generates original content, including modules, lessons, definitions, and quizzes, tailored to your chosen depth and pace. Explore diverse topics from history to finance with in-depth prose and interactive elements.

Highlights
  • AI-generated custom courses
  • In-depth lessons and definitions
  • End-of-course quizzes
  • Adjustable text complexity
  • AI assistant for questions
  • Audio lesson playback
  • Spaced repetition review
Features
Read full description

STRATA turns any subject into a full, structured course — in seconds. Type what you want to learn. Set how deep you want to go. STRATA builds a complete curriculum around it: real modules, full lessons, key concepts, definitions, notable passages, and a final quiz. No pre-packaged content. No browsing a catalog. Just your curiosity, and a course built for exactly that. LEARN ANYTHING History, physics, philosophy, finance, literature, medicine, design, law — if you can describe it, STRATA can teach it. The AI builds an original course from scratch, written at the depth and pace you choose. BUILT FOR DEPTH, NOT DISTRACTION Every lesson reads like it was written by someone who genuinely cares about the subject. Long-form prose, precise definitions, pull quotes from real thinkers, citations, formulas, and reflection prompts that make you stop and think. FREE WITH EVERY ACCOUNT — 1 AI-generated course per month — Full lesson content: prose, definitions, key points, pull quotes, citations — End-of-course quiz — Light and dark mode, adjustable text complexity SCHOLAR — $7.99/month or $64.99/year (auto-renewable) — 5 courses per month — Ink AI assistant (50 messages/month) — ask questions about what you're studying — Audio reading — listen to lessons in four natural voices — Lesson Connections — see how your courses relate to each other — Module comprehension checks — Full public library access LUMINARY — $14.99/month or $119.99/year (auto-renewable) — Unlimited courses per month — Ink AI assistant (200 messages/month) — Priority AI generation — Public course sharing — Full spaced repetition review system — All Scholar features included Subscriptions auto-renew monthly or annually. Cancel anytime in Settings → Apple ID → Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://koatechapps.com/privacy

Screenshots

AStars4 screens
STRATA4 screens

Verdict

The call

The clearest difference is in-app purchases: AStars at none against STRATA's 4. AStars also leads on iOS requirement (17.6 vs 26.0). STRATA's advantage is device support (3 vs 1). On price, rating, ratings volume and update cadence 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. STRATA sells 4 in-app purchases, starting at $7.99 per month. AStars 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 AStars against 5.0 for STRATA. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

AStars ships an update every 3 weeks, STRATA fortnightly. The most recent releases landed on June 1, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 6 level
AStars versus STRATA: the parameters behind the verdict, then further details
ParameterAStarsSTRATA
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings22
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS17.6 — better26.0
Further details — not scored
Size16 MB26 MB
Age rating4+4+
DeveloperSakchham SangroulaEVAN ASHTON MCDADE

Customer experience

AStars

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

STRATA

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AStars

No in-app purchases

4 purchases

STRATA

Subscriptions4
  • Scholar Monthly7 Days trial$7.991 Month
  • Luminary Monthly7 Days trial$14.991 Month
  • Scholar Yearly$59.991 Year
Show 1 more
  • Luminary Yearly$119.991 Year

Questions

Is AStars free?
AStars is free to download, with no in-app purchases.
Is STRATA free?
STRATA is free to download, with in-app purchases available.
Which has better reviews, AStars or STRATA?
AStars and STRATA are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do AStars or STRATA have ads?
Neither AStars nor STRATA shows ads.
Which is updated more often, AStars or STRATA?
AStars ships an update every 3 weeks, and STRATA fortnightly. Most recently, AStars was updated on June 1, 2026 and STRATA on September 18, 2026.

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