# Physics Short Note (Sinhala) vs Introductory Biology Tutor

The clearest difference is in-app purchases: Physics Short Note (Sinhala) at none against Introductory Biology Tutor's 1. Physics Short Note (Sinhala) also leads on iOS requirement (15.0 vs 17.0). Introductory Biology Tutor's advantage is ads (none vs shown) and update cadence (weekly vs every 36 months). On price and device support there is nothing between them.

Both are free to download. Introductory Biology Tutor sells 1 one-off in-app purchase. Physics Short Note (Sinhala) asks for nothing beyond the download.

Physics Short Note (Sinhala) ships an update every 36 months, Introductory Biology Tutor weekly. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Physics Short Note (Sinhala) | Introductory Biology Tutor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 36 months | **Weekly** |
| Size | 22 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Allen Koch](https://appshunter.io/developer/1712057886) | [David Soulsby](https://appshunter.io/developer/1776367161) |

## What reviewers say

### Physics Short Note (Sinhala)

[App page](https://appshunter.io/ios/app/physics-short-note-sinhala/id6469480075)

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

**In-app purchases:** none


### Introductory Biology Tutor

[App page](https://appshunter.io/ios/app/introductory-biology-tutor/id6814193597)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Introductory Biology Tutor Access | $4.99 | one-time |


## Frequently asked questions

### Is Physics Short Note (Sinhala) free?

Physics Short Note (Sinhala) is free to download, with no in-app purchases.

### Is Introductory Biology Tutor free?

Introductory Biology Tutor is free to download, with in-app purchases available.

### Do Physics Short Note (Sinhala) or Introductory Biology Tutor have ads?

Physics Short Note (Sinhala) shows ads; Introductory Biology Tutor does not.

### Which is updated more often, Physics Short Note (Sinhala) or Introductory Biology Tutor?

Physics Short Note (Sinhala) ships an update every 36 months, and Introductory Biology Tutor weekly. Most recently, Physics Short Note (Sinhala) was updated on November 7, 2026 and Introductory Biology Tutor on November 10, 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.*