# Protocol Tracker vs Sink Bathhouse

The clearest difference is in-app purchases: Sink Bathhouse at none against Protocol Tracker's 2. Sink Bathhouse also leads on iOS requirement (15.1 vs 26.0). Protocol Tracker's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Protocol Tracker sells 2 in-app purchases, starting at $3.99 per month. Sink Bathhouse asks for nothing beyond the download.

Protocol Tracker ships an update every 2 weeks, Sink Bathhouse every 2 months. Both last shipped on October 28, 2026.

## The numbers

| Metric | Protocol Tracker | Sink Bathhouse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/protocol-tracker-dosefi/id6760504673/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 55 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Mc Pol Cruz](https://appshunter.io/developer/1884728788) | [Momence, Inc.](https://appshunter.io/developer/1577856011) |

## What reviewers say

### Protocol Tracker

[App page](https://appshunter.io/ios/app/protocol-tracker-dosefi/id6760504673)

Log and track various aesthetic treatments including peptides, botox, skincare, and laser hair removal. Features include a treatment site map, progress photos, and vial inventory management with dose calculations. Schedule reminders to maintain your routine and monitor results over time.

**Highlights:** Log sessions with date, area, dose, and notes, Treatment site map for precise tracking, Customizable reminders for routines, Progress photo tracking, Vial inventory and dose math, Supports eight protocol types

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $34.99 | per year |


### Sink Bathhouse

[App page](https://appshunter.io/ios/app/sink-bathhouse/id6786604020)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protocol Tracker free?

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

### Is Sink Bathhouse free?

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

### Do Protocol Tracker or Sink Bathhouse have ads?

Neither Protocol Tracker nor Sink Bathhouse shows ads.

### Which is updated more often, Protocol Tracker or Sink Bathhouse?

Protocol Tracker ships an update every 2 weeks, and Sink Bathhouse every 2 months. Most recently, Protocol Tracker was updated on October 28, 2026 and Sink Bathhouse on October 28, 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.*