# Billdu vs 1Ci

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.

Both are free to download. Billdu sells 10 in-app purchases, starting at $7.99 per month. 1Ci asks for nothing beyond the download.

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.

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.

## The numbers

| Metric | Billdu | 1Ci |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (26K ratings)](https://appshunter.io/ios/app/billdu-invoice-estimate-maker/id527885754/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/1ciinvoice-maker/id1459657913/reviews)** |
| Number of ratings | **26K** | 5 |
| Positive reviews | **89.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 17 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#62** | — |
| Size | 205 MB | 120 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BILLDU LTD](https://appshunter.io/developer/501173313) | [1C-SOFT LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1188302931) |

## What reviewers say

### Billdu

[App page](https://appshunter.io/ios/app/billdu-invoice-estimate-maker/id527885754)

**Currently charting:** #62 Top Grossing · Business (US App Store)

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:** Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LITE - 1 month | $7.99 | per month |
| STANDARD (Month) | $14.99 | per month |
| STANDARD - 1 month | $14.99 | per month |
| STANDARD - 1 month | $14.99 | per month |
| PREMIUM (Month) | $27.99 | per month |
| PREMIUM - 1 month | $27.99 | per month |
| 24 invoices | $59.99 | per year |
| STARTER (Year) | $59.99 | per year |
| STANDARD (Year) | $119.99 | per year |
| STANDARD - 12 months | $119.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 📊 Helpful business features
- 🖼️ Professional-looking invoices
- 🕰️ Time-saving
- 💻 Seamless mobile experience

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔍 Limited customization options
- 💳 Billing/payment issues
- 🕰️ Slow customer support response

**Reported bugs**

- Invoices not being received by clients
- Inconsistent invoice numbering
- Inability to save draft estimates

**Requested features**

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


### 1Ci

[App page](https://appshunter.io/ios/app/1ciinvoice-maker/id1459657913)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*