Comparison

Seikyuu vs Bills Simple

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Seikyuu

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
Read full description

Seikyuu — Smart Invoicing, Get Paid Faster Run your business from your pocket with Seikyuu, the elegant invoicing app for freelancers and small business owners. PERFECT FOR: • Freelancers & consultants • Small business owners • Creative professionals • Service providers CORE FEATURES: GET PAID INSTANTLY • Send invoices with Stripe payment links • Clients pay with one click • Automatic payment tracking • Accept payments globally INVOICING MADE EASY • Create professional invoices in seconds • Track payment status in real-time • Customizable templates with your branding • PDF generation and email integration • Multi-currency support CLIENT FINANCING • Offer payment plans to clients • Split invoices into installments • Track payment schedule CLIENT & EXPENSE MANAGEMENT • Store client information and history • Snap photos of receipts • Categorize and track spending • Export for tax time INVENTORY & DASHBOARD • Manage products and services • Real-time revenue tracking • Cash flow insights and analytics • Visual charts and reports SMART FEATURES • Biometric security (Face ID/Touch ID) • Dark mode support • Cloud sync across devices • Data export (CSV, Excel) PRICING PLANS: FREE PLAN • 1 client, 1 invoice/month, 1 expense/month • Perfect for testing PRO PLAN - $19.00/month or $190.00/year • Unlimited clients, invoices, expenses • Stripe payment links • Client financing • Advanced analytics • PDF generation & email • Save $38/year with annual plan BUSINESS PLAN - $49.00/month or $490.00/year • Everything in Pro • Multi-user access (coming soon) • Advanced reporting & API access (coming soon) • Custom branding • Save $98/year with annual plan Subscriptions auto-renew unless cancelled. Cancel anytime in account settings or App Store. SECURITY & PRIVACY: • Bank-level encryption (Stripe certified) • Your data stays yours • GDPR & PCI DSS compliant • No ads, ever UNIVERSAL APP: One purchase works on iPhone, iPad, and Mac. WHY SEIKYUU? Unlike bloated accounting software, Seikyuu is designed for speed and simplicity. Create invoices in seconds, send payment links between meetings, get paid on the go. GET STARTED: 1. Download Seikyuu 2. Create your account 3. Add your first client 4. Send invoice with payment link 5. Get paid Download now and start for free. Stripe integration allows credit card payments worldwide. Free Stripe account needed (stripe.com). SUPPORT & LEGAL: Privacy Policy: https://www.seikyuu.com/privacy Terms of Service: https://www.seikyuu.com/terms Support: info@creativitech.co By downloading, you agree to our Terms of Service and Privacy Policy.

About

Bills Simple

Features
Read full description

Bills Simple — Professional Invoicing for Freelancers & Small Businesses Stop chasing payments. Start getting paid faster with beautiful, professional invoices you can create in under a minute. ONE APP FOR ALL YOUR BUSINESSES Running multiple ventures? No problem. Manage separate clients, invoices, and branding for each business all from one app. CREATE INVOICES IN 60 SECONDS Pick a professional template, add your logo and brand colors, enter line items with automatic calculations, and you're done. It's that simple. GET PAID YOUR WAY Accept credit cards online with integrated Stripe payments Add manual payment methods like bank transfer or cash Multi-currency support for clients worldwide STAY ORGANIZED Track every invoice from draft to paid See payment history, pending balances, and status updates at a glance Sort, filter, and find any invoice instantly Create quotes and estimates too Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://billssimple.com/privacy-policy

Screenshots

Seikyuu4 screens
Bills Simple4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard1 real difference · 9 level
Seikyuu versus Bills Simple: the parameters behind the verdict, then further details
ParameterSeikyuuBills Simple
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyDaily — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size28 MB38 MB
Age rating4+4+
DeveloperCarlos RamirezCarlos Castillo

In-app purchases

4 purchases

Seikyuu

Subscriptions4
  • Seikyuu Pro Month$19.001 Month
  • Seikyuu Business Month$49.001 Month
  • Seikyuu Pro Year$190.001 Year
Show 1 more
  • Seikyuu Business Year$490.001 Year
4 purchases

Bills Simple

Subscriptions4
  • Professionals$9.991 Month
  • Business$44.991 Month
  • Professionals Yearly$85.001 Year
Show 1 more
  • Business Yearly$299.991 Year

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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