# Penometer vs AI Butt Identifier

The clearest difference is update cadence: Penometer at fortnightly against AI Butt Identifier's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Penometer sells 3 in-app purchases, starting at $4.99 per month and AI Butt Identifier sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Penometer ships an update fortnightly, AI Butt Identifier every 3 months. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Penometer | AI Butt Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/penometer/id1561621238/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Freemium | — |
| Size | 16 MB | 30 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [TotalContent](https://appshunter.io/developer/1542541643) | [HE HE](https://appshunter.io/developer/1184879980) |

## What reviewers say

### Penometer

[App page](https://appshunter.io/ios/app/penometer/id1561621238)

Measure and track your body size metrics over time. Compare your measurements to national and global averages, and gain insights with a built-in analysis tool. Your data is kept private and secure.

**Highlights:** Measure length, width, and girth, Track changes over time with graphs, Compare size to global and national averages, Micropenis analysis tool, Private and secure data storage, Unlimited measurement history (Premium), Advanced trend analysis (Premium)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | per month |
| Full Access | $29.99 | per year |
| Full Access | $49.99 | one-time |


### AI Butt Identifier

[App page](https://appshunter.io/ios/app/ai-butt-identifier/id6749545002)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is Penometer free?

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

### Is AI Butt Identifier free?

AI Butt Identifier is free to download, with in-app purchases available.

### Do Penometer or AI Butt Identifier have ads?

Neither Penometer nor AI Butt Identifier shows ads.

### Which is updated more often, Penometer or AI Butt Identifier?

Penometer ships an update fortnightly, and AI Butt Identifier every 3 months. Most recently, Penometer was updated on September 14, 2026 and AI Butt Identifier on September 8, 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.*