# Billion Development vs ESTEBEL Spa

The clearest difference is ads: Billion Development at none against ESTEBEL Spa's shown. ESTEBEL Spa's advantage is update cadence (every 6 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Billion Development ships an update every 4 months, ESTEBEL Spa every 6 days. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Billion Development | ESTEBEL Spa |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 28 MB | 26 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Billion Development and Project Management Ltd.](https://appshunter.io/developer/1119106481) | [Simfusion apple](https://appshunter.io/developer/1473083320) |

## What reviewers say

### Billion Development

[App page](https://appshunter.io/ios/app/billion-development/id1119106482)

**Features:** macOS Compatibility

**In-app purchases:** none


### ESTEBEL Spa

[App page](https://appshunter.io/ios/app/estebel-spa/id1579455635)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Billion Development free?

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

### Is ESTEBEL Spa free?

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

### Do Billion Development or ESTEBEL Spa have ads?

ESTEBEL Spa shows ads; Billion Development does not.

### Which is updated more often, Billion Development or ESTEBEL Spa?

Billion Development ships an update every 4 months, and ESTEBEL Spa every 6 days. Most recently, Billion Development was updated on October 13, 2026 and ESTEBEL Spa on October 16, 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.*