# Substory vs Billie

The clearest difference is in-app purchases: Substory at none against Billie's 1. Billie's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 4 months). On price and device support there is nothing between them.

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

Substory ships an update every 4 months, Billie every 2 weeks. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Substory | Billie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 34 MB | 23 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beomsu Na](https://appshunter.io/developer/1814288558) | [Yunseok Lee](https://appshunter.io/developer/1884613302) |

## What reviewers say

### Substory

[App page](https://appshunter.io/ios/app/substory-subscription-tracker/id6749816206)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Substory free?

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

### Is Billie free?

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

### Do Substory or Billie have ads?

Substory shows ads; Billie does not.

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

Substory ships an update every 4 months, and Billie every 2 weeks. Most recently, Substory was updated on October 6, 2026 and Billie on October 11, 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.*