# SoloPDF vs Lunbi

The clearest difference is in-app purchases: SoloPDF at none against Lunbi's 3. SoloPDF also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17.0). Lunbi's advantage is update cadence (every 4 days vs every 2 weeks). On price and ads there is nothing between them.

Both are free to download. Lunbi sells 3 in-app purchases, starting at $1.99 per month. SoloPDF asks for nothing beyond the download.

SoloPDF ships an update every 2 weeks, Lunbi every 4 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | SoloPDF | Lunbi |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 24 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [向东 李](https://appshunter.io/developer/1885418034) | [hyeukJin kim](https://appshunter.io/developer/1490612198) |

## What reviewers say

### SoloPDF

[App page](https://appshunter.io/ios/app/solopdf/id6787712953)

**Features:** Vision Pro support

**In-app purchases:** none


### Lunbi

[App page](https://appshunter.io/ios/app/lunbi-habit-tracker/id6796928746)

This app helps you build consistent habits by allowing you to set custom goals and track your progress visually. Watch your efforts grow into a unique digital world as you complete your routines.

**Highlights:** Customizable habit goals (weekly, monthly, bi-monthly), One-tap habit check-in, Visual progress tracking, Gamified world growth, iCloud sync for data backup, Create and edit habits

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lunbi Pro Monthly | $1.99 | per month |
| Lunbi Pro Yearly | $19.99 | per year |
| Lunbi Pro Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is SoloPDF free?

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

### Is Lunbi free?

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

### Do SoloPDF or Lunbi have ads?

Neither SoloPDF nor Lunbi shows ads.

### Which is updated more often, SoloPDF or Lunbi?

SoloPDF ships an update every 2 weeks, and Lunbi every 4 days. Most recently, SoloPDF was updated on October 31, 2026 and Lunbi on November 6, 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.*