# Sample for Science vs Sera

The clearest difference is in-app purchases: Sample for Science at none against Sera's 2. Sample for Science also leads on iOS requirement (12.0 vs 17.0). Sera's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Sera sells 2 in-app purchases, starting at $9.99 per month. Sample for Science asks for nothing beyond the download.

Sample for Science ships an update every 6 weeks, Sera every 2 weeks. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sample for Science | Sera |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 58 MB | 78 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Universidade Federal Fluminense - UFF](https://appshunter.io/developer/739312311) | [M1 Labs](https://appshunter.io/developer/1686811349) |

## What reviewers say

### Sample for Science

[App page](https://appshunter.io/ios/app/sample-for-science/id6470819452)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Sample for Science free?

Sample for Science is free to download, with no in-app purchases.

### Is Sera free?

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

### Do Sample for Science or Sera have ads?

Neither Sample for Science nor Sera shows ads.

### Which is updated more often, Sample for Science or Sera?

Sample for Science ships an update every 6 weeks, and Sera every 2 weeks. Most recently, Sample for Science was updated on October 30, 2026 and Sera on October 24, 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.*