# VIIO vs 数独 8

The clearest difference is price: VIIO at Free against 数独 8's $0.99. VIIO also leads on iOS requirement (15.6 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

VIIO is free to download; 数独 8 costs $0.99 up front. VIIO sells 10 in-app purchases, starting at $2.99 per month and 数独 8 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

VIIO ships an update every 9 days, 数独 8 every 5 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | VIIO | 数独 8 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (1.2K ratings)](https://appshunter.io/ios/app/viio-text-reader/id1570401477/reviews)** | — |
| Number of ratings | **1.2K** | — |
| Positive reviews | 68.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 124 MB | 36 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Otonye Bestman](https://appshunter.io/developer/1466177310) | [梦旭 张](https://appshunter.io/developer/1788338420) |

## What reviewers say

### VIIO

[App page](https://appshunter.io/ios/app/viio-text-reader/id1570401477)

Transform written content into spoken audio with this app. Easily convert text from documents, PDFs, or copied content into a clear, audible format. Customize voice, speed, and pitch for a personalized listening experience.

**Highlights:** Text-to-speech conversion, Read aloud from documents and PDFs, Copy text for audio playback, Adjustable reading speed, Customizable voice options, Highlighting important sections

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus plan | $2.99 | per month |
| HD plan | $6.99 | per month |
| Human plan | $16.99 | per month |
| HD yearly plan | $59.99 | per year |
| 50,000 characters | $0.99 | one-time |
| 100,000 characters | $1.99 | one-time |
| 200,000 characters | $2.99 | one-time |
| 50,000 human characters | $3.99 | one-time |
| 100,000 human characters | $5.99 | one-time |
| 200,000 human characters | $10.99 | one-time |

**What reviewers like**

- 💡 Useful for reading and comprehension
- 👍 Easy to use and navigate
- 🚀 Efficient text-to-speech functionality
- 👍 Helpful for neurodiverse users

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- 🔒 Concerns about paid subscription model
- 🔋 Complaints about character/word limits in free version
- 👎 Robotic or unnatural-sounding voices

**Reported bugs**

- App crashes after updates
- Inconsistent performance across devices
- Issues with text recognition and pronunciation

**Requested features**

- Ability to adjust reading speed
- Support for more languages and accents
- Improved PDF and document handling
- Integration with other reading/productivity apps


### 数独 8

[App page](https://appshunter.io/ios/app/8/id6742703658)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SudoKu 8 all game modes | $0.99 | one-time |


## Frequently asked questions

### Is VIIO free?

VIIO is free to download, with in-app purchases available.

### Is 数独 8 free?

数独 8 costs $0.99, and also offers in-app purchases.

### Do VIIO or 数独 8 have ads?

Neither VIIO nor 数独 8 shows ads.

### Which is updated more often, VIIO or 数独 8?

VIIO ships an update every 9 days, and 数独 8 every 5 days. Most recently, VIIO was updated on October 15, 2026 and 数独 8 on October 11, 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.*