# Orenda vs PDF Document Translator

The clearest difference is in-app purchases: Orenda at none against PDF Document Translator's 3. PDF Document Translator's advantage is update cadence (every 8 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Document Translator sells 3 one-off in-app purchases. Orenda asks for nothing beyond the download.

Orenda ships an update monthly, PDF Document Translator every 8 days. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Orenda | PDF Document Translator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (477 ratings)](https://appshunter.io/ios/app/orenda/id1171005221/reviews)** | — |
| Number of ratings | **477** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 8 days** |
| Monetization | Free | — |
| Size | 78 MB | 120 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hasa Inc.](https://appshunter.io/developer/1713193810) | [Gun woo Kim](https://appshunter.io/developer/1700263119) |

## What reviewers say

### Orenda

[App page](https://appshunter.io/ios/app/orenda/id1171005221)

This app helps you master pool chemistry by accurately calculating chemical dosages and balancing water based on the LSI. It offers a user-friendly experience for both novices and professionals, including a volume estimator and educational videos.

**Highlights:** Chemical dosing calculator, LSI water balancing, Pool volume estimator, User-friendly interface, Educational videos

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Helpful for pool maintenance
- 🚀 Simplifies pool chemistry
- 👍 Provides valuable information
- 👍 Great educational resources

**What reviewers complain about**

- 🐛 Issues with updating desired levels
- 🐛 Metric system not working properly
- 🐛 Difficult to input readings
- 🐛 Lack of history/logging functionality

**Reported bugs**

- Desired levels changing when inputting current values
- Metric system not functioning as expected
- Slider feature for inputting readings is slow and frustrating
- App not optimized for all iPhone screen sizes

**Requested features**

- Ability to save pool volume and desired levels
- Option to log pool history and track trends
- Integration with pool chemical monitors
- Ability to set custom chemical concentrations
- Support for more languages (e.g., Chinese)


### PDF Document Translator

[App page](https://appshunter.io/ios/app/pdf-document-translator-ai/id6791969007)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Credits | $2.99 | one-time |
| 200 Credits | $7.99 | one-time |
| 1000 Credits | $24.99 | one-time |


## Frequently asked questions

### Is Orenda free?

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

### Is PDF Document Translator free?

PDF Document Translator is free to download, with in-app purchases available.

### Do Orenda or PDF Document Translator have ads?

Neither Orenda nor PDF Document Translator shows ads.

### Which is updated more often, Orenda or PDF Document Translator?

Orenda ships an update monthly, and PDF Document Translator every 8 days. Most recently, Orenda was updated on October 21, 2026 and PDF Document Translator on October 7, 2026.

---

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