# LBC Underground vs Synthesis Tracker

The clearest difference is update cadence: Synthesis Tracker at weekly against LBC Underground's every 5 weeks. Synthesis Tracker also leads on ratings volume (12 vs 1) and monetization model (free vs ad-supported). 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 — 5.0 for LBC Underground against 5.0 for Synthesis Tracker. That said, the two scores are not equally well evidenced: Synthesis Tracker has 12 ratings behind it against 1, so its average is the more settled of the two.

LBC Underground ships an update every 5 weeks, Synthesis Tracker weekly. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | LBC Underground | Synthesis Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/lbc-underground/id1449626517/reviews) | [5.0 (12 ratings)](https://appshunter.io/ios/app/synthesis-tracker/id6788431222/reviews) |
| Number of ratings | 1 | **12** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Ad-supported | **Free** |
| Size | 192 MB | 58 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [L.B.C. Underground Inc.](https://appshunter.io/developer/1449626516) | [Outliers Inc.](https://appshunter.io/developer/6788431224) |

## What reviewers say

### LBC Underground

[App page](https://appshunter.io/ios/app/lbc-underground/id1449626517)

This app helps you plan and schedule group fitness classes focused on weightlifting, boxing, and cardio rowing. View class schedules, sign up, and access studio location and social media information.

**Highlights:** View class schedules, Sign up for classes, Studio location information, Access social media, Plan and schedule workouts

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

**In-app purchases:** none


### Synthesis Tracker

[App page](https://appshunter.io/ios/app/synthesis-tracker/id6788431222)

This app allows parents to easily log their child's ADHD symptoms and daily progress using voice input. It analyzes these logs to identify patterns in mood, focus, and behavior, providing a clear report for healthcare providers.

**Highlights:** Voice logging for quick entries, Track doses, mood, sleep, focus, and appetite, Automatic pattern detection, Build trend reports, 7-day timeline review, Private by design with on-device transcription

**In-app purchases:** none


## Frequently asked questions

### Is LBC Underground free?

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

### Is Synthesis Tracker free?

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

### Which has better reviews, LBC Underground or Synthesis Tracker?

LBC Underground and Synthesis Tracker are both rated 5.0 out of 5 on the App Store, from 1 and 12 ratings respectively.

### Do LBC Underground or Synthesis Tracker have ads?

Neither LBC Underground nor Synthesis Tracker shows ads.

### Which is updated more often, LBC Underground or Synthesis Tracker?

LBC Underground ships an update every 5 weeks, and Synthesis Tracker weekly. Most recently, LBC Underground was updated on October 10, 2026 and Synthesis Tracker on October 13, 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.*