# Stellar Lab vs MASTRO

The clearest difference is ads: Stellar Lab at none against MASTRO's shown. Stellar Lab also leads on update cadence (every 6 days vs fortnightly). MASTRO's advantage is iOS requirement (14.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Stellar Lab sells 7 in-app purchases, starting at $3.99 per 7 days and MASTRO sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stellar Lab ships an update every 6 days, MASTRO fortnightly. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Stellar Lab | MASTRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (32 ratings)](https://appshunter.io/ios/app/stellar-lab-astrology-guide/id6480304595/reviews)** | — |
| Number of ratings | **32** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 169 MB | 40 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Vasili Murashka](https://appshunter.io/developer/715093089) | [SUPERKEN LLC](https://appshunter.io/developer/1779452934) |

## What reviewers say

### Stellar Lab

[App page](https://appshunter.io/ios/app/stellar-lab-astrology-guide/id6480304595)

Explore your life and relationships through the lens of astrology. Discover zodiac compatibility, learn about celestial influences, and receive personalized daily insights. Experience augmented reality views of planetary positions.

**Highlights:** Zodiac compatibility reports, Extensive astrological information library, Personalized chat features, Augmented reality planetary views, Daily personalized predictions, Learn about planets and stars

**Features:** Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stellar Lab Premium Weekly | $3.99 | per 7 days |
| Stellar Lab Plus Weekly | $4.99 | per 7 days |
| Stellar Lab Premium Weekly | $7.99 | per 7 days |
| Stellar Lab Plus Monthly | $9.99 | per month |
| Stellar Lab Premium 3 Months | $19.99 | per 3 months |
| Stellar Lab Plus Yearly | $39.99 | per year |
| Stellar Lab Premium Yearly | $49.99 | per year |


### MASTRO

[App page](https://appshunter.io/ios/app/mastro/id6738116785)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| weekly | $7.99 | per 7 days |
| 3months | $39.99 | per 3 months |
| yearly | $49.99 | per year |


## Frequently asked questions

### Is Stellar Lab free?

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

### Is MASTRO free?

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

### Do Stellar Lab or MASTRO have ads?

MASTRO shows ads; Stellar Lab does not.

### Which is updated more often, Stellar Lab or MASTRO?

Stellar Lab ships an update every 6 days, and MASTRO fortnightly. Most recently, Stellar Lab was updated on September 29, 2026 and MASTRO on October 10, 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.*