# Mariners vs Keratin Lab

The clearest difference is update cadence: Keratin Lab at fortnightly against Mariners's every 6 months. Mariners's advantage is ratings volume (61 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Mariners against 5.0 for Keratin Lab. That said, the two scores are not equally well evidenced: Mariners has 61 ratings behind it against 1, so its average is the more settled of the two.

Mariners ships an update every 6 months, Keratin Lab fortnightly. The most recent releases landed on October 8, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mariners | Keratin Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (61 ratings)](https://appshunter.io/ios/app/mariners/id1507433171/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keratin-lab/id6450368211/reviews)** |
| Number of ratings | **61** | 1 |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 90 MB | 396 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Mariners Church](https://appshunter.io/developer/868116064) | [JTO Enterprise, Inc](https://appshunter.io/developer/1692945156) |

## What reviewers say

### Mariners

[App page](https://appshunter.io/ios/app/mariners/id1507433171)

Engage with upcoming events, access biblical resources, and connect with the community. This app facilitates spiritual growth and participation in church activities.

**Highlights:** View upcoming events, Access biblical content, Community engagement tools, Give to the church

**Features:** macOS Compatibility

**In-app purchases:** none


### Keratin Lab

[App page](https://appshunter.io/ios/app/keratin-lab/id6450368211)

Discover the latest nail trends, book appointments effortlessly, and receive expert care tips. Stay updated with salon news and exclusive offers through push notifications. Share your stunning manicures and earn loyalty rewards with each visit.

**Highlights:** Trendy nail designs, Easy appointment booking, Expert nail care tips, Push notifications and reminders, Social sharing of manicures, Loyalty rewards program

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Mariners free?

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

### Is Keratin Lab free?

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

### Which has better reviews, Mariners or Keratin Lab?

Keratin Lab is rated higher. Mariners averages 4.9 out of 5 from 61 ratings, while Keratin Lab averages 5.0 from 1 ratings.

### Do Mariners or Keratin Lab have ads?

Neither Mariners nor Keratin Lab shows ads.

### Which is updated more often, Mariners or Keratin Lab?

Mariners ships an update every 6 months, and Keratin Lab fortnightly. Most recently, Mariners was updated on October 8, 2026 and Keratin Lab on September 21, 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.*