# Pdf Studio vs SinceWhen

The clearest difference is in-app purchases: Pdf Studio at none against SinceWhen's 3. Pdf Studio also leads on iOS requirement (15.5 vs 17.6). SinceWhen's advantage is ads (none vs shown) and update cadence (weekly vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. SinceWhen sells 3 in-app purchases, starting at $4.99 per month. Pdf Studio asks for nothing beyond the download.

Pdf Studio ships an update every 3 weeks, SinceWhen weekly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Pdf Studio | SinceWhen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (14 ratings)](https://appshunter.io/ios/app/sincewhen-days-since-counter/id6759450144/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 57 MB | 12 MB |
| Requires iOS | **15.5** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Satyam Sahu](https://appshunter.io/developer/1608998714) | [Basharath Shaik](https://appshunter.io/developer/1878663261) |

## What reviewers say

### Pdf Studio

[App page](https://appshunter.io/ios/app/pdf-studio-reader-and-listener/id1608998712)

**Features:** Vision Pro support

**In-app purchases:** none


### SinceWhen

[App page](https://appshunter.io/ios/app/sincewhen-days-since-counter/id6759450144)

Track the time elapsed since important events, from personal care to home maintenance. Get gentle reminders for when things are due next, with smart predictions based on your logging habits. Designed for real life, it offers a private and guilt-free way to manage recurring tasks.

**Highlights:** Log events with one tap, Smart predictions for due dates, Widgets for Home and Lock Screen, Siri and Shortcuts integration, Multi-day event tracking, Calendar and chart visualizations, Private by design, no account needed

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SinceWhen Pro + Family (Monthly) | $4.99 | per month |
| SinceWhen Pro + Family (Yearly) | $19.99 | per year |
| SinceWhen Pro (Lifetime) | $39.99 | one-time |


## Frequently asked questions

### Is Pdf Studio free?

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

### Is SinceWhen free?

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

### Do Pdf Studio or SinceWhen have ads?

Pdf Studio shows ads; SinceWhen does not.

### Which is updated more often, Pdf Studio or SinceWhen?

Pdf Studio ships an update every 3 weeks, and SinceWhen weekly. Most recently, Pdf Studio was updated on October 25, 2026 and SinceWhen on October 31, 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.*