# TapTapBlocks vs Universal Zoom

The clearest difference is price: TapTapBlocks at Free against Universal Zoom's $5.99. TapTapBlocks also leads on iOS requirement (13.0 vs 17.0). Universal Zoom's advantage is rating (4.8 vs 4.3) and review sentiment (97% vs 71%). On update cadence, ads, in-app purchases and device support there is nothing between them.

TapTapBlocks is free to download; Universal Zoom costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Universal Zoom holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 94 and 369 respectively. Written reviews point the same way: 71% of TapTapBlocks's written reviews are positive against 97% of Universal Zoom's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | TapTapBlocks | Universal Zoom |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | [4.3 (94 ratings)](https://appshunter.io/ios/app/taptapblocks/id433121899/reviews) | **[4.8 (369 ratings)](https://appshunter.io/ios/app/universal-zoom-science-guide/id807673066/reviews)** |
| Number of ratings | 94 | **369** |
| Positive reviews | 70.6% of reviews | **96.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 4 MB | 176 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hangas](https://appshunter.io/developer/433121902) | [GamifyIt](https://appshunter.io/developer/807673069) |

## What reviewers say

### TapTapBlocks

[App page](https://appshunter.io/ios/app/taptapblocks/id433121899)

Build and design with colorful 3D blocks limited only by your imagination. Easily add, remove, and rotate blocks with intuitive touch controls. Save and share your unique creations with friends.

**Highlights:** Unlimited colorful building block combinations, Single tap to add or remove blocks, One-finger 3D rotation, Pinch and zoom for detailed views, Save and email creations

**Features:** macOS Compatibility

**In-app purchases:** none


### Universal Zoom

[App page](https://appshunter.io/ios/app/universal-zoom-science-guide/id807673066)

Explore the vastness of the universe, from subatomic particles to galaxies, with interactive scale comparisons and clear explanations. Discover scientific concepts visually and intuitively, making complex topics accessible to everyone. This app offers a deep dive into physics, biology, and astronomy with high-quality visuals and detailed information.

**Highlights:** Seamless zoom from Planck length to observable universe, Side-by-side object comparisons, Audio narration and accessible explanations, Exploration of particles, cells, planets, and galaxies, High-resolution images and original artwork, Available in 40 languages, Metric, imperial, or powers-of-ten units

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 👍 Fascinating and informative
- 🚀 Smooth and seamless experience
- 💡 Puts things into perspective
- 👍 Great learning tool for all ages
- 👍 Visually appealing and well-designed

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔋 High battery consumption
- 🔇 Background music could be improved

**Reported bugs**

- Incorrect information for some objects
- Compatibility issues on older devices
- Typos and minor errors in text

**Requested features**

- Add more objects and comparisons
- Customizable object feature
- Support for more languages
- Ability to toggle between metric and imperial units
- Search and filtering options


## Frequently asked questions

### Is TapTapBlocks free?

TapTapBlocks is free to download, with no in-app purchases.

### Is Universal Zoom free?

Universal Zoom costs $5.99, with no in-app purchases.

### Which has better reviews, TapTapBlocks or Universal Zoom?

Universal Zoom is rated higher. TapTapBlocks averages 4.3 out of 5 from 94 ratings, while Universal Zoom averages 4.8 from 369 ratings.

### Do TapTapBlocks or Universal Zoom have ads?

Neither TapTapBlocks nor Universal Zoom shows ads.

### Which is updated more often, TapTapBlocks or Universal Zoom?

TapTapBlocks ships an update every 4 months, and Universal Zoom every 4 months. Most recently, TapTapBlocks was updated on November 1, 2026 and Universal Zoom on November 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*