Comparison

CellWalk vs ByeGrammar

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

Head to head
About

CellWalk

Explore the intricate world of cells in a 3D environment, from the overall structure down to molecular details. Tap on terms to receive clear, contextual explanations powered by on-device AI, adapting to your learning level. Designed for students and educators to foster a deeper understanding of cell biology.

Highlights
  • 3D cell exploration
  • On-device AI definitions
  • Multi-level explanations
  • Interactive concept chains
  • Touch-first navigation
  • High-fidelity visuals
Read full description

CellWalk puts a living cell in your hands and on your desk. Zoom from a whole cell down to the atoms in DNA. Explore a cell modeled protein by protein from real structures discovered by scientists. Start your journey with Ako, an AI tutor that helps you understand what you see. Built for students, teachers and anyone curious about how life works at the molecular scale. 2025 Apple Design Award finalist. EXPLORE A REAL CELL Zoom from a whole Mycoplasma cell down to single atoms. Thousands of proteins, DNA and RNA, ribosomes and membranes, rendered from published scientific data. Tap any molecule to learn what it is and what it does. Tap any term for an explanation at your level, written on your device with Apple Intelligence. Place molecular scenes in your space with augmented reality on compatible iPhone and iPad devices. LEARN WITH AKO Ako helps you build understanding through questions. It brings molecular structures into view, invites you to look closer and explain what you notice, then builds on your answers to help you make connections. Socratic learning, one discovery at a time. Type or dictate. Ask anything about what’s on screen or in your space. Your Ako lessons, your progress in them and what Ako has learned about you stay with you: on your device and, if you use iCloud, in your own iCloud. Get more of Ako with CellWalk Pro. GUIDED TOURS Start your journey with The Molecular Design of Life, a complete tour of the Mycoplasma cell made with Dr. David Goodsell. Each tour includes a guided narration, free explore mode and Ako practice lessons to test your understanding. CellWalk Pro adds more guided tours and lessons with an expanded library of cells and organisms. Explore the incredible molecular machines that power neurons and thought, or dive into the architecture of a virus like HIV. LEARN BY DOING Step into the Central Dogma of Biology with a hands-on interactive lesson on the all new Learning Path. Learn how the instructions in DNA are read and translated into the proteins that build and sustain your cells. WHAT’S FREE Explore The Molecular Design of Life tour and its accompanying Ako lesson and explore modes, and try the “What is a Protein?” interactive lesson on the Learning Path. You can also ask Ako in-depth questions with a free daily allowance. CELLWALK PRO Unlock all other guided tours and their accompanying Ako lessons, a larger daily question allowance and longer answers from Ako. Choose a monthly or annual auto-renewing subscription. One subscription covers iPhone, iPad and Mac. ASK FROM ANYWHERE Say “Ask CellWalk a biology question” and Siri answers from CellWalk’s own content without opening the app. “Continue my lesson in CellWalk” picks up where you left off. On iPhone and iPad, use Visual Intelligence on a textbook diagram, choose Search CellWalk with an Image, and tap a match to open that tour, lesson or molecule. HOW THE AI WORKS Ako is built with the Foundation Models framework. Where Apple Intelligence is available, it answers on Private Cloud Compute, and the on-device model explains the terms you tap. OpenAI, a third-party AI service, plans lessons and answers when Apple Intelligence isn’t available on your device or in your region. The app asks your permission before sending your first question. You can change that permission under Account → Privacy. CellWalk doesn’t require a separate CellWalk account, and AI requests aren’t tied to your name. Find details under Account → Privacy → About CellWalk & AI. Apple Intelligence features require iPhone 15 Pro or later, an iPad with M1 or A17 Pro or later, or a Mac with Apple silicon. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://cellwalk.ca/terms-of-service Privacy Policy: https://cellwalk.ca/privacy

About

ByeGrammar

Features
Read full description

ByeGrammar fixes your mistakes, then helps you learn from them. Every mistake becomes a flashcard, so you stop making the same one. With the ByeGrammar keyboard, you can fix your writing in any app without copying anything anywhere. Terms of Service: https://app.byegrammar.com/terms Privacy Policy: https://app.byegrammar.com/privacy

Screenshots

CellWalk4 screens
ByeGrammar3 screens

Verdict

The call

The clearest difference is ads: CellWalk at none against ByeGrammar's shown. CellWalk also leads on update cadence (every 3 weeks vs every 2 months) and device support (4 vs 2). ByeGrammar's advantage is iOS requirement (16.0 vs 27.0). On price and in-app purchases 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. CellWalk sells 3 in-app purchases, starting at $9.99 per month and ByeGrammar sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CellWalk ships an update every 3 weeks, ByeGrammar every 2 months. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
CellWalk versus ByeGrammar: the parameters behind the verdict, then further details
ParameterCellWalkByeGrammar
PriceFreeFree
Rating4.9 (71 ratings) — better—
Positive reviews91.7% of reviews—
Number of ratings71 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPod
Requires iOS27.016.0 — better
Further details — not scored
Size552 MB68 MB
Age rating12+4+
DeveloperAko Biotica Inc.Jialiang Xu

Bugs and requests

CellWalk

Reported bugs

4 issues
  • ATP synthase described backwards
  • Renderer noise causes nausea
  • Buggy and low framerate
  • Renderer not responsive to head movements

Requested features

10 requests
  • More cells to explore (eukaryotic, mammalian, computer cells)
  • More content and depth
  • Expand on descriptions with an 'expand on' feature
  • Add tutorials for new users
  • Add color to highlighted text for easy reference
Show 5 more
  • Depict a minimal eukaryotic cell
  • Depict a cell undergoing mitosis
  • Make cell models free-floating instead of behind windows
  • Option to purchase additional content
  • Update renderer for responsiveness to head movements

ByeGrammar

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

CellWalk

Subscriptions2
  • CellWalk Pro Monthly$9.991 Month
  • CellWalk Pro Annual$79.991 Year
One-time1
  • Pro Lessons$29.99
2 purchases

ByeGrammar

Subscriptions2
  • ByeGrammar Plus Weekly$5.997 Days
  • ByeGrammar Plus Monthly$9.991 Month

Questions

Is CellWalk free?
CellWalk is free to download, with in-app purchases available.
Is ByeGrammar free?
ByeGrammar is free to download, with in-app purchases available.
Do CellWalk or ByeGrammar have ads?
ByeGrammar shows ads; CellWalk does not.
Which is updated more often, CellWalk or ByeGrammar?
CellWalk ships an update every 3 weeks, and ByeGrammar every 2 months. Most recently, CellWalk was updated on October 17, 2026 and ByeGrammar on October 16, 2026.

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