# SLT vs CORE40 AMSTERDAM

SLT and CORE40 AMSTERDAM are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

SLT ships an update every 4 weeks, CORE40 AMSTERDAM monthly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SLT | CORE40 AMSTERDAM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3.3K ratings)](https://appshunter.io/ios/app/slt/id1473159998/reviews)** | — |
| Number of ratings | **3.3K** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Ad-supported | — |
| Size | 38 MB | 197 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [CORE40 CENTRUM B.V.](https://appshunter.io/developer/1487030741) |

## What reviewers say

### SLT

[App page](https://appshunter.io/ios/app/slt/id1473159998)

Book and manage fitness classes directly from your phone. View studio schedules, purchase class packages, and access your account information. Stay connected with the studio through social media links.

**Highlights:** Book classes, View studio schedules, Purchase class packages, Manage account, View reservations, Find studio locations

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

**In-app purchases:** none


### CORE40 AMSTERDAM

[App page](https://appshunter.io/ios/app/core40-amsterdam/id1487030742)

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

**In-app purchases:** none


## Frequently asked questions

### Is SLT free?

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

### Is CORE40 AMSTERDAM free?

CORE40 AMSTERDAM is free to download, with no in-app purchases.

### Do SLT or CORE40 AMSTERDAM have ads?

Neither SLT nor CORE40 AMSTERDAM shows ads.

### Which is updated more often, SLT or CORE40 AMSTERDAM?

SLT ships an update every 4 weeks, and CORE40 AMSTERDAM monthly. Most recently, SLT was updated on October 31, 2026 and CORE40 AMSTERDAM on October 24, 2026.

---

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