# Krystal Bio vs Pee Tracker & Bladder Log

The clearest difference is in-app purchases: Krystal Bio at none against Pee Tracker & Bladder Log's 5. Krystal Bio also leads on update cadence (every 9 days vs every 4 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Pee Tracker & Bladder Log sells 5 in-app purchases, starting at $4.99 per 7 days. Krystal Bio asks for nothing beyond the download.

Krystal Bio ships an update every 9 days, Pee Tracker & Bladder Log every 4 months. The most recent releases landed on September 13, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Krystal Bio | Pee Tracker & Bladder Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (36 ratings)](https://appshunter.io/ios/app/pee-tracker-and-bladder-log/id6749036216/reviews)** |
| Number of ratings | — | **36** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 4 months |
| Monetization | — | Freemium |
| Size | 17 MB | 100 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Curebase, Inc.](https://appshunter.io/developer/1437100129) | [Hussain Mustafa](https://appshunter.io/developer/1247104628) |

## What reviewers say

### Krystal Bio

[App page](https://appshunter.io/ios/app/krystal-bio/id6503323932)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pee Tracker & Bladder Log

[App page](https://appshunter.io/ios/app/pee-tracker-and-bladder-log/id6749036216)

Easily track urinary habits, fluid intake, and incontinence episodes. Generate detailed reports to share with healthcare providers for better diagnosis and treatment planning.

**Highlights:** Log voiding events with time and volume, Track fluid intake and type, Record leakage and incontinence episodes, Monitor urgency levels, Track nighttime urination (nocturia), Add notes on symptoms, Generate and share PDF reports

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $9.99 | per month |
| Premium Yearly | $19.99 | per year |
| Premium Yearly | $39.99 | per year |
| Premium Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Krystal Bio free?

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

### Is Pee Tracker & Bladder Log free?

Pee Tracker & Bladder Log is free to download, with in-app purchases available.

### Do Krystal Bio or Pee Tracker & Bladder Log have ads?

Neither Krystal Bio nor Pee Tracker & Bladder Log shows ads.

### Which is updated more often, Krystal Bio or Pee Tracker & Bladder Log?

Krystal Bio ships an update every 9 days, and Pee Tracker & Bladder Log every 4 months. Most recently, Krystal Bio was updated on September 13, 2026 and Pee Tracker & Bladder Log on September 19, 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.*