Comparison

Vision Tracker vs Tai Chi Alien

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

Head to head
About

Vision Tracker

Features
Read full description

Vision Tracker is designed for parents to monitor their child’s vision and detect abnormal myopia progression early. Instead of just recording data, we focus on one key question: Is your child’s vision getting worse too fast? Key Features: [Trend Tracking] Track refraction and axial length over time with clear visual charts. [Risk Assessment] Automatically evaluate myopia progression based on yearly changes. [AI Insights (Pro)] Get AI-powered explanations and practical recommendations. [PDF Reports] Generate professional reports to share with your doctor. [Privacy First] All data is stored locally on your device by default. Who it's for: - Parents monitoring children’s vision - Long-term myopia tracking - Health-conscious families Disclaimer: This app is for informational purposes only and does not provide medical advice. Please consult an eye care professional when needed. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.vkefun.com/app/visionmng/privacy-policy-en.html

About

Tai Chi Alien

Features
Read full description

Welcome to Tai Chi Alien. Let the Alien Guide you for five minutes, then you're ready for the next level. The key to progress with any mindfulness training is to stick with it even when you want more stimulation.

Screenshots

Vision Tracker4 screens
Tai Chi Alien3 screens

Verdict

The call

The clearest difference is in-app purchases: Tai Chi Alien at none against Vision Tracker's 2. Tai Chi Alien also leads on update cadence (daily vs every 8 days) and device support (4 vs 2). On price and ads 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. Vision Tracker sells 2 in-app purchases, starting at $2.99 per month. Tai Chi Alien asks for nothing beyond the download.

UpkeepUpdate frequency

Vision Tracker ships an update every 8 days, Tai Chi Alien daily. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 2 level
Vision Tracker versus Tai Chi Alien: the parameters behind the verdict, then further details
ParameterVision TrackerTai Chi Alien
PriceFreeFree
Update frequencyEvery 8 daysDaily — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.015.0 — better
Further details — not scored
Size11 MB175 MB
Age rating12+4+
Developer跃松 邬Mind Body Aware Games LLC

In-app purchases

2 purchases

Vision Tracker

Subscriptions2
  • Vision Tracker Pro (Monthly)$2.991 Month
  • Vision Tracker Pro (Yearly)$19.991 Year
None

Tai Chi Alien

No in-app purchases

Questions

Is Vision Tracker free?
Vision Tracker is free to download, with in-app purchases available.
Is Tai Chi Alien free?
Tai Chi Alien is free to download, with no in-app purchases.
Do Vision Tracker or Tai Chi Alien have ads?
Neither Vision Tracker nor Tai Chi Alien shows ads.
Which is updated more often, Vision Tracker or Tai Chi Alien?
Vision Tracker ships an update every 8 days, and Tai Chi Alien daily. Most recently, Vision Tracker was updated on October 18, 2026 and Tai Chi Alien on October 9, 2026.

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