# Tree Survey vs Unlock PDF

The clearest difference is rating: Unlock PDF at 5.0 against Tree Survey's 2.5. Tree Survey's advantage is in-app purchases (none vs 4) and iOS requirement (10.0 vs 16.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. Unlock PDF sells 4 in-app purchases, starting at $0.99 per 7 days. Tree Survey asks for nothing beyond the download.

Unlock PDF holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 38% of Tree Survey's written reviews are positive against 44% of Unlock PDF's.

Tree Survey ships an update every 3 months, Unlock PDF every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Tree Survey | Unlock PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/tree-survey/id1415733867/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/unlock-pdf-password-remover/id1661533684/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 37.5% of reviews | **44.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 34 MB | 33 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Solution House Software](https://appshunter.io/developer/808778580) | [Ashvin Ajadiya](https://appshunter.io/developer/1442111420) |

## What reviewers say

### Tree Survey

[App page](https://appshunter.io/ios/app/tree-survey/id1415733867)

Report and track infestations of the polyphagous shot hole borer (PSHB) to help manage its spread. The app aids in initiating treatment and notifying local organizations about affected areas.

**Highlights:** Report PSHB infestations, Track infestation spread, Initiate appropriate treatment, Notify local organizations, Measure PSHB spread

**Features:** macOS Compatibility

**In-app purchases:** none


### Unlock PDF

[App page](https://appshunter.io/ios/app/unlock-pdf-password-remover/id1661533684)

Easily access password-protected documents with this secure tool. It instantly unlocks encrypted PDFs, removes restrictions, and allows quick export and sharing of your files. Works offline for enhanced privacy and features a user-friendly interface with dark mode support.

**Highlights:** Unlock password-protected PDFs, Remove PDF restrictions, Export and share unlocked files, Offline functionality, User-friendly interface, Dark Mode support

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access - Weekly | $0.99 | per 7 days |
| Unlimited Access - Monthly | $2.99 | per month |
| Unlimited Access - Yearly | $14.99 | per year |
| Unlimited - Unlock PDF | $49.99 | one-time |


## Frequently asked questions

### Is Tree Survey free?

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

### Is Unlock PDF free?

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

### Which has better reviews, Tree Survey or Unlock PDF?

Unlock PDF is rated higher. Tree Survey averages 2.5 out of 5 from 2 ratings, while Unlock PDF averages 5.0 from 2 ratings.

### Do Tree Survey or Unlock PDF have ads?

Neither Tree Survey nor Unlock PDF shows ads.

### Which is updated more often, Tree Survey or Unlock PDF?

Tree Survey ships an update every 3 months, and Unlock PDF every 2 months. Most recently, Tree Survey was updated on November 2, 2026 and Unlock PDF on November 3, 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.*