# STL Viewer vs Exam Study Planner

The clearest difference is in-app purchases: STL Viewer at none against Exam Study Planner's 3. Exam Study Planner's advantage is update cadence (every 5 days vs every 43 months) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Exam Study Planner sells 3 in-app purchases, starting at $3.99 per month. STL Viewer asks for nothing beyond the download.

STL Viewer ships an update every 43 months, Exam Study Planner every 5 days. Both last shipped on October 8, 2026.

## The numbers

| Metric | STL Viewer | Exam Study Planner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/exam-study-planner-vitae/id6752669220/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 76 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [Antonin Weissgerber](https://appshunter.io/developer/1829957852) |

## What reviewers say

### STL Viewer

[App page](https://appshunter.io/ios/app/stl-viewer/id6445801487)

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

**In-app purchases:** none


### Exam Study Planner

[App page](https://appshunter.io/ios/app/exam-study-planner-vitae/id6752669220)

Enhance concentration and study efficiency with scientifically-backed binaural beats and ambient soundscapes. This app offers tools like a Pomodoro timer and custom sound presets to help students focus during study sessions, homework, and exam preparation. It's designed to reduce mental noise and improve task focus, even for users with ADHD.

**Highlights:** Binaural beats for focus and relaxation, Curated ambient soundscapes, Pomodoro timer for focused sessions, Customizable sound presets, Offline functionality, ADHD-friendly focus tools

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium: Monthly Access | $3.99 | per month |
| Premium: Yearly Access | $22.99 | per year |
| Binaural Beats Premium | $3.99 | one-time |


## Frequently asked questions

### Is STL Viewer free?

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

### Is Exam Study Planner free?

Exam Study Planner is free to download, with in-app purchases available.

### Do STL Viewer or Exam Study Planner have ads?

Neither STL Viewer nor Exam Study Planner shows ads.

### Which is updated more often, STL Viewer or Exam Study Planner?

STL Viewer ships an update every 43 months, and Exam Study Planner every 5 days. Most recently, STL Viewer was updated on October 8, 2026 and Exam Study Planner on October 8, 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.*