# Sera vs Introductory Physics Tutor

Sera and Introductory Physics Tutor are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Sera sells 2 in-app purchases, starting at $9.99 per month and Introductory Physics Tutor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Sera | Introductory Physics Tutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/sera-astronomy-space-and-moon/id6759331330/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free | — |
| Size | 78 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [M1 Labs](https://appshunter.io/developer/1686811349) | [David Soulsby](https://appshunter.io/developer/1776367161) |

## What reviewers say

### Sera

[App page](https://appshunter.io/ios/app/sera-astronomy-space-and-moon/id6759331330)

Master the universe with daily, bite-sized lessons on astronomy and space. Explore a 3D solar system, get AI-summarized NASA news, and plan your astrophotography with field tools. Designed for quick learning and preserving night vision.

**Highlights:** 1-Minute Daily Astronomy Lessons, 48 Core Astronomy Domains, Interactive 3D Solar System Explorer, AI-Summarized NASA News, Lunar Calendar & Eclipse Tracking, Astrophotography Planning Tools, Night Vision Friendly Dark Mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SERA Pro Monthly | $9.99 | per month |
| SERA Pro Annual | $44.99 | per year |


### Introductory Physics Tutor

[App page](https://appshunter.io/ios/app/introductory-physics-tutor/id6815791812)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is Sera free?

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

### Is Introductory Physics Tutor free?

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

### Do Sera or Introductory Physics Tutor have ads?

Neither Sera nor Introductory Physics Tutor shows ads.

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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.*