# Seikyuu vs Bills Simple

The clearest difference is update cadence: Seikyuu at daily against Bills Simple's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Seikyuu sells 4 in-app purchases, starting at $19.00 per month and Bills Simple sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Seikyuu ships an update daily, Bills Simple every 3 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | Seikyuu | Bills Simple |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/seikyuu/id6753657899/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 28 MB | 38 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Ramirez](https://appshunter.io/developer/1844215160) | [Carlos Castillo](https://appshunter.io/developer/1860998092) |

## What reviewers say

### Seikyuu

[App page](https://appshunter.io/ios/app/seikyuu/id6753657899)

This app helps freelancers and small businesses create and send professional invoices quickly. It allows clients to pay instantly via payment links and offers features like payment plans, expense tracking, and real-time revenue insights.

**Highlights:** Instant payment links via Stripe, Customizable invoice templates, Client payment plans, Expense tracking with receipt photos, Real-time revenue dashboard, Cloud sync across devices

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Seikyuu Pro Month | $19.00 | per month |
| Seikyuu Business Month | $49.00 | per month |
| Seikyuu Pro Year | $190.00 | per year |
| Seikyuu Business Year | $490.00 | per year |


### Bills Simple

[App page](https://appshunter.io/ios/app/bills-simple/id6756504452)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professionals | $9.99 | per month |
| Business | $44.99 | per month |
| Professionals Yearly | $85.00 | per year |
| Business Yearly | $299.99 | per year |


## Frequently asked questions

### Is Seikyuu free?

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

### Is Bills Simple free?

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

### Do Seikyuu or Bills Simple have ads?

Neither Seikyuu nor Bills Simple shows ads.

### Which is updated more often, Seikyuu or Bills Simple?

Seikyuu ships an update daily, and Bills Simple every 3 weeks. Most recently, Seikyuu was updated on October 30, 2026 and Bills Simple on October 30, 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.*