# ShelfSpry vs Aether

The clearest difference is update cadence: Aether at weekly against ShelfSpry's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

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

ShelfSpry ships an update every 2 months, Aether weekly. The most recent releases landed on October 12, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | ShelfSpry | Aether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aether-knowledge-engine/id6761418802/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free |
| Size | 36 MB | 18 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vaibhav Sharma](https://appshunter.io/developer/1826304028) | [Critical Dynamics OU](https://appshunter.io/developer/330152929) |

## What reviewers say

### ShelfSpry

[App page](https://appshunter.io/ios/app/shelfspry-expiry-tracker/id6757110826)

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

**In-app purchases:** none


### Aether

[App page](https://appshunter.io/ios/app/aether-knowledge-engine/id6761418802)

Save any link and let AI transform it into structured, searchable knowledge. Automatically extracts, transcribes, analyzes, and summarizes content from videos, articles, and more into a personal vault.

**Highlights:** Instant link capture from any app, AI transcription of YouTube videos, AI analysis of Instagram images with OCR, AI-generated content summaries, Semantic search by meaning, Automatic content organization, Bilingual support (English/Turkish)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ShelfSpry free?

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

### Is Aether free?

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

### Do ShelfSpry or Aether have ads?

Neither ShelfSpry nor Aether shows ads.

### Which is updated more often, ShelfSpry or Aether?

ShelfSpry ships an update every 2 months, and Aether weekly. Most recently, ShelfSpry was updated on October 12, 2026 and Aether on October 23, 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.*