# BTB Performance vs Cancer Tracker

The clearest difference is in-app purchases: BTB Performance at none against Cancer Tracker's 17. BTB Performance also leads on update cadence (every 5 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cancer Tracker sells 17 in-app purchases, starting at $4.95 per month. BTB Performance asks for nothing beyond the download.

BTB Performance ships an update every 5 weeks, Cancer Tracker every 5 months. The most recent releases landed on September 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BTB Performance | Cancer Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/cancer-tracker/id6743565076/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 218 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Fit Cloud Technology Limited](https://appshunter.io/developer/1079311129) | [Digital Therapeutics](https://appshunter.io/developer/1721663167) |

## What reviewers say

### BTB Performance

[App page](https://appshunter.io/ios/app/btb-performance/id6742022677)

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

**In-app purchases:** none


### Cancer Tracker

[App page](https://appshunter.io/ios/app/cancer-tracker/id6743565076)

This app helps individuals manage their cancer treatment by tracking symptoms, medications, and recovery progress. It provides insights into the body's response to treatment and facilitates better communication with healthcare providers. Features include medication reminders, progress charts, and secure, exportable reports.

**Highlights:** Symptom tracking with sliders and notes, Treatment and medication logging, Side effect monitoring, Progress charts and analytics, Medication and custom reminders, Nutrition and hydration tracking, Secure, exportable reports, Apple Health integration

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| steady pass | $4.95 | per month |
| easy pass | $7.99 | per 7 days |
| weather max | $9.99 | per 3 months |
| flex pass | $18.99 | per month |
| carey ai max | $19.99 | per month |
| yearly access | $19.99 | per year |
| smart pass | $19.99 | per year |
| limited discount | $19.99 | per year |
| carey ai ultra | $29.99 | per month |
| plus | $29.99 | per year |
| Premium Yearly | $34.99 | per year |
| yearly access | $39.99 | per year |
| Extended Trial | $39.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $1.99 | one-time |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $79.99 | one-time |


## Frequently asked questions

### Is BTB Performance free?

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

### Is Cancer Tracker free?

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

### Do BTB Performance or Cancer Tracker have ads?

Neither BTB Performance nor Cancer Tracker shows ads.

### Which is updated more often, BTB Performance or Cancer Tracker?

BTB Performance ships an update every 5 weeks, and Cancer Tracker every 5 months. Most recently, BTB Performance was updated on September 26, 2026 and Cancer Tracker on October 7, 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.*