# Just 1 Source vs Viralz App

The clearest difference is in-app purchases: Just 1 Source at none against Viralz App's 2. Just 1 Source also leads on iOS requirement (13.0 vs 15.1). Viralz App's advantage is update cadence (every 8 days vs every 22 months) and device support. On price there is nothing between them.

Both are free to download. Viralz App sells 2 in-app purchases, starting at $3.99 per 7 days. Just 1 Source asks for nothing beyond the download.

Just 1 Source ships an update every 22 months, Viralz App every 8 days. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Just 1 Source | Viralz App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 22 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 45 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Adventoris Limited](https://appshunter.io/developer/848210364) | [Tausif Meah](https://appshunter.io/developer/1810441799) |

## What reviewers say

### Just 1 Source

[App page](https://appshunter.io/ios/app/just-1-source/id1671557056)

**In-app purchases:** none


### Viralz App

[App page](https://appshunter.io/ios/app/viralz-app/id6745021669)

Leverage AI to analyze your TikTok content and understand why videos go viral. Get personalized insights, identify underperforming content, and discover strategies to boost engagement and reach.

**Highlights:** AI-powered profile analysis, Identify underperforming content, Discover algorithm-confusing descriptions and hashtags, Detect content formats damaging reach, Actionable recommendations for engagement, Track content performance over time

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Viralz Weekly Membership | $3.99 | per 7 days |
| Viralz Monthly Membership | $12.99 | per month |


## Frequently asked questions

### Is Just 1 Source free?

Just 1 Source is free to download, with no in-app purchases.

### Is Viralz App free?

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

### Which is updated more often, Just 1 Source or Viralz App?

Just 1 Source ships an update every 22 months, and Viralz App every 8 days. Most recently, Just 1 Source was updated on October 8, 2026 and Viralz App on October 16, 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.*