Comparison

Answer AI vs Libstackz

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

Head to head
About

Answer AI

This AI-powered app acts as a math solver and homework helper. It can scan math problems from paper or whiteboards, providing instant, step-by-step solutions and detailed explanations for various subjects. It aims to replace the need for expensive tutors.

Highlights
  • Scan math equations from paper or whiteboard
  • Solve printed or handwritten math problems
  • Get interactive step-by-step explanations
  • Covers Math, Biology, Chemistry, Physics
  • AI-powered homework assistance
Features
Read full description

ANSWER AI The Math Solver app used AI to replace the need for expensive tutors. Ask it any question about almost any topic. Whether it's a multiple-choice question or a short-answer question, AISolver has your back. Check your homework, and provide detailed explanations to questions, you need it we do it. AISolver will help you to solve the problems within seconds. Oh it's so fast and amazing, isn't it? Just snap a picture of the question of the homework and the app will provide you with the step-by-step solution. This app covers all levels and all fields, subjects: Math, Biology, Chemistry, and Physics, ... Features: - Scan any equation from paper, whiteboard - Scanning works for printed or handwritten math problem - Get interactive step-by-step explanations You can upgrade to Premium with a one-time payment or buy subscription options: - a monthly subscription (which comes with a 3-day free trial). - a weekly subscription – Payment will be charged to iTunes Account at confirmation of purchase. – Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. – Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://ninnstudio.com/privacy.html Terms of Services: https://ninnstudio.com/terms.html Contact us at: https://ninnstudio.com/#contact

About

Libstackz

Features
Read full description

Libstackz makes it easy to discover books, manage borrowings, and stay connected with your libraries, all in one place. Whether you're a student, reader, or library member, Libstackz simplifies your reading experience from search to return. # Discover Books Across Libraries Browse catalogs from participating libraries and explore thousands of titles instantly. Find what you need faster and smarter. # Borrow Books Without the Hassle Reserve books directly from your phone and manage active borrowings easily. No paperwork. No confusion. Just reading. # Track Your Reading Journey Stay updated with: - borrowed books - due dates - return reminders - borrowing history Everything organized in one timeline. # Build Your Personal Library Save books you own, plan to read, or want later. Your reading world stays with you. # Access Multiple Libraries in One App Switch between registered libraries seamlessly. One membership experience. One platform. # Stay Notified Automatically Receive reminders before due dates and updates from your libraries so you never miss important activity.

Screenshots

Answer AI4 screens
Libstackz4 screens

Verdict

The call

The clearest difference is in-app purchases: Libstackz at none against Answer AI's 5. Libstackz also leads on ads (none vs shown). Answer AI's advantage is update cadence (weekly vs every 3 months) and iOS requirement (12.0 vs 15.0). On price 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. Answer AI sells 5 in-app purchases, starting at $6.99 per 7 days. Libstackz asks for nothing beyond the download.

UpkeepUpdate frequency

Answer AI ships an update weekly, Libstackz every 3 months. The most recent releases landed on October 30, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
Answer AI versus Libstackz: the parameters behind the verdict, then further details
ParameterAnswer AILibstackz
PriceFreeFree
Rating4.6 (436 ratings) — better—
Positive reviews21.4% of reviews—
Number of ratings436 — better—
Update frequencyWeekly — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size54 MB41 MB
Age rating4+4+
DeveloperNin NguyenZiqx CC

Bugs and requests

Answer AI

Reported bugs

5 issues
  • App kicks users out
  • App stopped working
  • Purchase errors
  • Incorrect answers for questions
  • Charged after cancellation

Libstackz

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Answer AI

Subscriptions4
  • Weekly Premium Access$6.997 Days
  • Monthly Subscription$13.991 Month
  • Monthly Premium Access$19.991 Month
Show 1 more
  • Annual Premium Member3 Days trial$51.991 Year
One-time1
  • Lifetime Premium$79.99
None

Libstackz

No in-app purchases

Questions

Is Answer AI free?
Answer AI is free to download, with in-app purchases available.
Is Libstackz free?
Libstackz is free to download, with no in-app purchases.
Do Answer AI or Libstackz have ads?
Answer AI shows ads; Libstackz does not.
Which is updated more often, Answer AI or Libstackz?
Answer AI ships an update weekly, and Libstackz every 3 months. Most recently, Answer AI was updated on October 30, 2026 and Libstackz on October 23, 2026.

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