# SACNAS vs ASTC

The clearest difference is iOS requirement: ASTC at 15.5 against SACNAS's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SACNAS ships an update every 6 months, ASTC every 11 months. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SACNAS | ASTC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (36 ratings)](https://appshunter.io/ios/app/astc/id6466039138/reviews)** |
| Number of ratings | — | **36** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 11 months |
| Monetization | — | Free |
| Size | 60 MB | 87 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Society For Advancement Of Chicanos and Native Americans in Science, Inc.](https://appshunter.io/developer/1700715708) | [ASSOCIATION OF SCIENCE-TECHNOLOGY CENTERS, INC.](https://appshunter.io/developer/1437372010) |

## What reviewers say

### SACNAS

[App page](https://appshunter.io/ios/app/sacnas/id6456981839)

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

**In-app purchases:** none


### ASTC

[App page](https://appshunter.io/ios/app/astc/id6466039138)

Enhance your conference experience by accessing schedules, speaker details, and exhibitor information. Take notes directly on presentation slides in real-time and share insights with attendees via in-app messaging, tweeting, or email.

**Highlights:** View conference schedule, Access speaker and exhibitor details, Take real-time notes on slides, Draw directly on presentation slides, In-app messaging with attendees, Share information via tweet/email

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

**In-app purchases:** none


## Frequently asked questions

### Is SACNAS free?

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

### Is ASTC free?

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

### Do SACNAS or ASTC have ads?

Neither SACNAS nor ASTC shows ads.

### Which is updated more often, SACNAS or ASTC?

SACNAS ships an update every 6 months, and ASTC every 11 months. Most recently, SACNAS was updated on October 10, 2026 and ASTC on October 16, 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.*