# SLT vs CalPal

The clearest difference is in-app purchases: SLT at none against CalPal's 3. SLT also leads on ratings volume (3.3K vs 7). CalPal's advantage is review sentiment (100% vs 71%) and update cadence (every 6 days vs every 4 weeks). On price, rating and ads there is nothing between them.

Both are free to download. CalPal sells 3 in-app purchases, starting at $1.99 per month. SLT asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SLT against 5.0 for CalPal. That said, the two scores are not equally well evidenced: SLT has 3.3K ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 71% of SLT's written reviews are positive against 100% of CalPal's.

SLT ships an update every 4 weeks, CalPal every 6 days. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SLT | CalPal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3.3K ratings)](https://appshunter.io/ios/app/slt/id1473159998/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/calpal-macro-tracker/id6741034493/reviews) |
| Number of ratings | **3.3K** | 7 |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 6 days** |
| Monetization | **Ad-supported** | Freemium |
| Size | 38 MB | 29 MB |
| Requires iOS | 16.0 | **13.4** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mariana Tek Corporation](https://appshunter.io/developer/1178746980) | [Nikola Uzelac](https://appshunter.io/developer/1514031623) |

## 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


### CalPal

[App page](https://appshunter.io/ios/app/calpal-macro-tracker/id6741034493)

Effortlessly track your nutrition by simply taking a photo of your meal. Get instant macro estimates and clear insights to guide your health journey without tedious logging.

**Highlights:** Instant macro estimates via photo scanning, Intuitive interface for daily tracking, Real-time progress visualization, Simplified nutrition logging, Goal-oriented health insights

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $1.99 | per month |
| Yearly Membership | $19.99 | per year |
| CalPal Day Pass | $0.99 | one-time |


## Frequently asked questions

### Is SLT free?

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

### Is CalPal free?

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

### Which has better reviews, SLT or CalPal?

SLT and CalPal are both rated 5.0 out of 5 on the App Store, from 3.3K and 7 ratings respectively.

### Do SLT or CalPal have ads?

Neither SLT nor CalPal shows ads.

### Which is updated more often, SLT or CalPal?

SLT ships an update every 4 weeks, and CalPal every 6 days. Most recently, SLT was updated on October 20, 2026 and CalPal on October 6, 2026.

---

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