# Modify PDF Pro vs Screen Time Control

The clearest difference is update cadence: Screen Time Control at every 9 days against Modify PDF Pro's every 6 months. Modify PDF Pro's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Modify PDF Pro sells 3 in-app purchases, starting at $3.99 per month and Screen Time Control sells 7 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Modify PDF Pro ships an update every 6 months, Screen Time Control every 9 days. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Modify PDF Pro | Screen Time Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (20 ratings)](https://appshunter.io/ios/app/screen-time-control-spudy/id6760586395/reviews)** |
| Number of ratings | — | **20** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 75 MB | 80 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jose Antonio Salinas Garcia](https://appshunter.io/developer/1803226958) | [Victor Cristobal Gonzalez Martin](https://appshunter.io/developer/1885177608) |

## What reviewers say

### Modify PDF Pro

[App page](https://appshunter.io/ios/app/modify-pdf-pro/id6760251517)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smart OCR Mensual | $3.99 | per month |
| Smart OCR Anual | $34.99 | per year |
| Cuenta premium vitalicia | $69.99 | one-time |


### Screen Time Control

[App page](https://appshunter.io/ios/app/screen-time-control-spudy/id6760586395)

This app helps you break phone addiction by earning screen time through habit completion. Build streaks, use focus timers, and complete challenges to unlock your phone usage. It offers smart app blocking and on-device AI for photo verification.

**Highlights:** Earn screen time through habit completion, Smart app blocking with iOS Screen Time integration, Focus timers (Pomodoro, Deep Work), Habit tracking across 8 categories, Photo quests with on-device AI verification, Pushup challenges with pose detection, Live Activities and widgets

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $4.99 | per month |
| Premium Monthly | $9.99 | per month |
| Exclusive 6-Month Offer | $14.99 | per 6 months |
| Premium | $29.99 | per year |
| Premium | $39.99 | per year |
| Premium | $39.99 | per year |


## Frequently asked questions

### Is Modify PDF Pro free?

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

### Is Screen Time Control free?

Screen Time Control is free to download, with in-app purchases available.

### Do Modify PDF Pro or Screen Time Control have ads?

Neither Modify PDF Pro nor Screen Time Control shows ads.

### Which is updated more often, Modify PDF Pro or Screen Time Control?

Modify PDF Pro ships an update every 6 months, and Screen Time Control every 9 days. Most recently, Modify PDF Pro was updated on October 8, 2026 and Screen Time Control on October 4, 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.*