# Billie vs SubZero

The clearest difference is in-app purchases: SubZero at none against Billie's 1. Billie's advantage is ads (none vs shown) and iOS requirement (13.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Billie sells 1 one-off in-app purchase. SubZero asks for nothing beyond the download.

Billie ships an update every 2 weeks, SubZero monthly. The most recent releases landed on September 9, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Billie | SubZero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 23 MB | 13 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yunseok Lee](https://appshunter.io/developer/1884613302) | [emirhan cifci](https://appshunter.io/developer/1837498715) |

## What reviewers say

### Billie

[App page](https://appshunter.io/ios/app/billie-subscription-tracker/id6760472738)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Billie Premium | $9.99 | one-time |


### SubZero

[App page](https://appshunter.io/ios/app/subzero-subscription-tracker/id6760584552)

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

**In-app purchases:** none


## Frequently asked questions

### Is Billie free?

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

### Is SubZero free?

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

### Do Billie or SubZero have ads?

SubZero shows ads; Billie does not.

### Which is updated more often, Billie or SubZero?

Billie ships an update every 2 weeks, and SubZero monthly. Most recently, Billie was updated on September 9, 2026 and SubZero on September 24, 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.*