Comparison

Billdu vs 1Ci

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

Head to head
About

Billdu

Create professional invoices and estimates quickly for your small business. This app helps you get paid faster with online payment options, track expenses by scanning receipts, and manage clients and inventory. It's designed for freelancers and contractors to maintain a professional image and streamline billing.

Highlights
  • Customizable invoice templates
  • Instant estimates and invoices
  • Online payment processing
  • Receipt scanning for expense tracking
  • Client and inventory management
  • Multi-device synchronization
Features
Currently charting
Read full description

Billdu is your all-in-one invoice maker, estimate generator, and billing app designed for small businesses, contractors, and freelancers in the US. Whether you’re creating a simple invoice, a professional estimate, or tracking receipts, Billdu makes it fast, easy, and reliable. Why choose Billdu? • Customizable Invoice Templates – Personalize with your logo, colors, and signature. Choose from professional layouts that impress clients. • Instant Estimates & Invoices – Create and send documents right after the job is done. • Get Paid Faster – Enable Stripe-powered Online Payments to accept credit cards, Apple Pay, Google Pay, and other popular payment methods. • Expense Tracking – Scan receipts, categorize expenses, and keep your business finances organized. • Contractor-Friendly Tools – Perfect for construction, plumbing, electrical, and service-based businesses. • Multi-Device Sync – Access your account and data from iPhone, iPad, or desktop in real-time. • Inventory Management – Track products, manage stock, and add items to invoices in one tap. • Client Management – Store and organize client data, import from contacts, and send reminders. Who Billdu is for? Billdu is perfect for contractors, estimators, and service companies including: painters, concrete, HVAC, roofers, renovators, plumbers, siding, lawn care, construction, electricians, carpenters, flooring, builders, pest control, tile, handymen, landscapers, drywallers, paving, remodeling, arborists, cleaning, general contractors, scaffolding, insulation, pool, EV charger installers and more! Advanced Features: - Attach product images to invoices - Know when an invoice was opened - Connect directly with your accountant - Use offline and sync later - Secure with Face ID or Touch ID - Generate reports and track cash flow Flexible Plans: Try Billdu free for 7 days. Upgrade to Lite, Standard, or Premium for unlimited invoices, estimates, and clients. Billdu helps you save time, get paid faster, and stay organized — all while maintaining a professional image. Terms: https://my.billdu.com/page/condition Privacy: https://my.billdu.com/page/protection

About

1Ci

Create and send professional invoices and estimates quickly from your mobile device. Ideal for freelancers and small businesses, it allows for easy client setup, item saving, and PDF generation for sharing via email or other platforms.

Highlights
  • Create invoices and estimates
  • Generate professional PDF invoices
  • Email or share invoices
  • Convert estimates to invoices
  • Apply discounts
  • Set up clients from contacts
Features
Read full description

Easy invoicing for small business owners, freelancers and contractors. Invoice and Estimate on the Go Send an invoice or estimate directly from the client. Our mobile app is perfect for on-the-go invoicing. Enter all the details you need, including tax, discounts, and more. Save items for faster invoicing later. Save your time Easy and quickly create professional Invoices and Estimates wherever you are. With a customer, between jobs, or at home. Convert estimates to invoices with one click. Share With Invoice Maker, you'll be invoicing your customers in no time and sending professional PDF invoices with ease. Share, email or print your invoices. Accept credit card payments as well as cash, check, Paypal and others. Look professional Always look professional and stay organized. Features - Create Invoice or Estimate for any your product or service - Create a PDF Invoice or estimate with a built-in PDF invoice generator - Email or share your Invoices or estimates - Send Estimates to your customers, then convert them to Invoices later - Discount on item or total - Quickly set up clients from your phone contact list - And more... For support, send email sbm@1c.ru Privacy policy: https://sbm.1c.ru/about/privacy/

Screenshots

Billdu4 screens
1Ci4 screens

Verdict

The call

The clearest difference is review sentiment: Billdu at 89% against 1Ci's 0%. Billdu also leads on update cadence (every 2 weeks vs every 17 months) and ratings volume (26K vs 5). 1Ci's advantage is in-app purchases (none vs 11) and rating (5.0 vs 4.8). On price, ads 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. Billdu sells 10 in-app purchases, starting at $7.99 per month. 1Ci asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

1Ci holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Billdu has 26K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 89% of Billdu's written reviews are positive against 0% of 1Ci's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Billdu ships an update every 2 weeks, 1Ci every 17 months. The most recent releases landed on September 27, 2026 and August 12, 2026 respectively.

Scorecard8 real differences · 3 level
Billdu versus 1Ci: the parameters behind the verdict, then further details
ParameterBilldu1Ci
PriceFreeFree
Rating4.8 (26K ratings)5.0 (5 ratings) — better
Positive reviews89.3% of reviews — better0.0% of reviews
Number of ratings26K — better5
Update frequencyEvery 2 weeks — betterEvery 17 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#62 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.09.0 — better
Further details — not scored
Size205 MB120 MB
Age rating4+4+
DeveloperBILLDU LTD1C-SOFT LIMITED LIABILITY COMPANY

Customer experience

Billdu

All ratings26,064 ratings
Positive95.9%
Neutral2.0%
Negative2.1%
Written reviews1,140 reviews
Positive89.3%
Neutral2.5%
Negative8.2%

1Ci

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Billdu

Reported bugs

3 issues
  • Invoices not being received by clients
  • Inconsistent invoice numbering
  • Inability to save draft estimates

Requested features

5 requests
  • Improved date/time handling
  • Ability to transfer data between businesses
  • More customization options for invoices
  • Integrated payment processing
  • Enhanced reporting and analytics

1Ci

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Billdu

Subscriptions10
  • LITE - 1 month$7.991 Month
  • STANDARD (Month)$14.991 Month
  • STANDARD - 1 month$14.991 Month
Show 7 more
  • STANDARD - 1 month7 Days trial$14.991 Month
  • PREMIUM (Month)$27.991 Month
  • PREMIUM - 1 month$27.991 Month
  • 24 invoices$59.991 Year
  • STARTER (Year)$59.991 Year
  • STANDARD (Year)$119.991 Year
  • STANDARD - 12 months$119.991 Year
None

1Ci

No in-app purchases

Questions

Is Billdu free?
Billdu is free to download, with in-app purchases available.
Is 1Ci free?
1Ci is free to download, with no in-app purchases.
Which has better reviews, Billdu or 1Ci?
1Ci is rated higher. Billdu averages 4.8 out of 5 from 26K ratings, while 1Ci averages 5.0 from 5 ratings.
Do Billdu or 1Ci have ads?
Neither Billdu nor 1Ci shows ads.
Which is updated more often, Billdu or 1Ci?
Billdu ships an update every 2 weeks, and 1Ci every 17 months. Most recently, Billdu was updated on September 27, 2026 and 1Ci on August 12, 2026.

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