The Impossible Letter Game vs PolyBlocks Vision VR
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
The Impossible Letter Game
Test your visual acuity and focus with this challenging puzzle game. It presents simple yet incredibly difficult levels designed to push your observational skills to the limit. Prepare for an extreme eye exercise.
- Extreme eye exercise
- Challenging puzzles
- Skill testing
- Simple gameplay
- Impossible levels
Read full descriptionHide full description
THE ULTIMATE EXTREME EYE EXERCISE GAME! The simplest and yet the most impossible game ever! Put your skills to the test, because this game will challenge you like never before. Good luck finding the most!
PolyBlocks Vision VR
Read full descriptionHide full description
PolyBlocks Vision VR is a virtual reality puzzle game designed to support players with lazy eye (amblyopia & strabismus). Drawing inspiration from visual therapy research, it offers an entertainment-based experience that takes a fun-first approach to improving binocular vision through engaging, eye-coordinated gameplay. Core Premise Control falling blocks, place them strategically, and clear lines in a unique dual-screen system where: - One eye sees falling blocks - The other eye sees placed blocks - Your brain combines both images into one complete picture to successfully play the game and exercise your binocular vision Core Gameplay - Rotate and place blocks to complete lines - Clear lines to continue progressing - Each eye contributes part of the solution - A fresh twist on classic puzzle gameplay What You'll Need - Smartphone VR Headset (e.g., Google Cardboard) - Bluetooth Controller (PlayStation, Xbox, 8BitDo, and more) Key Features Screen Calibration - Adjust screen placement to match your eyes and align based on your degree of strabismus or eye misalignment (e.g., exotropia, esotropia, hypertropia, hypotropia, etc.) - Supports a range of visual conditions Configurable Controls - Fully re-mappable controls across gameplay and menus - Compatible with Bluetooth-enabled controllers - Customize your playstyle for comfort and control Accessibility Settings - Toggle which eye sees falling blocks - Enable or disable animations (background and blocks) - Adjust brightness (alpha) for each eye, helping balance visual input for players with amblyopia (lazy eye) - Personalize your experience for clarity and comfort Building Back Vision, One Block at a Time While inspired by medical studies on visual therapy, PolyBlocks Vision VR is not an FDA approved treatment. Health Drop Games LLC (c) 2026 Patent Pending
Screenshots
Verdict
The clearest difference is in-app purchases: PolyBlocks Vision VR at none against The Impossible Letter Game's 4. PolyBlocks Vision VR also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.1). 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
Both are free to download. The Impossible Letter Game sells 4 one-off in-app purchases. PolyBlocks Vision VR asks for nothing beyond the download.
| Parameter | The Impossible Letter Game | PolyBlocks Vision VR |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (17K ratings) — better | — |
| Positive reviews | 81.4% of reviews | — |
| Number of ratings | 17K — better | — |
| Update frequency | Every 4 months | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 75 MB | 189 MB |
| Age rating | 4+ | 4+ |
| Developer | GammaLateral LLC | Health Drop Games LLC |
Bugs and requests
The Impossible Letter Game
Reported bugs
2 issues- Inconsistent level difficulty
- Crashing and freezing issues
Requested features
3 requests- Option to skip difficult levels
- Pause timer during level transitions
- More game modes and level variety
PolyBlocks Vision VR
Not enough reviews yet to summarise bugs or requests.
In-app purchases
The Impossible Letter Game
- Get 30 Hints$0.99
- Get 70 Hints$1.99
- Get 120 Hints$2.99
Show 1 moreShow fewer
- Remove Ads$9.99
PolyBlocks Vision VR
No in-app purchases
Questions
Is The Impossible Letter Game free?
Is PolyBlocks Vision VR free?
Do The Impossible Letter Game or PolyBlocks Vision VR have ads?
Other comparisons















