# Flyksoft vs Seikyuu

The clearest difference is in-app purchases: Flyksoft at none against Seikyuu's 4. Seikyuu's advantage is update cadence (daily vs weekly) and iOS requirement (13.0 vs 15.0). On price, ads 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. Flyksoft asks for nothing beyond the download.

Flyksoft ships an update weekly, Seikyuu daily. The most recent releases landed on September 14, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Flyksoft | Seikyuu |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | — | Freemium |
| Size | 37 MB | 28 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Flyksoft Solutions LLC](https://appshunter.io/developer/1702191481) | [Carlos Ramirez](https://appshunter.io/developer/1844215160) |

## What reviewers say

### Flyksoft

[App page](https://appshunter.io/ios/app/flyksoft-admin/id6468949733)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Flyksoft free?

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

### Is Seikyuu free?

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

### Do Flyksoft or Seikyuu have ads?

Neither Flyksoft nor Seikyuu shows ads.

### Which is updated more often, Flyksoft or Seikyuu?

Flyksoft ships an update weekly, and Seikyuu daily. Most recently, Flyksoft was updated on September 14, 2026 and Seikyuu on September 17, 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.*