# Cubic vs Spongee

The clearest difference is update cadence: Cubic at every 6 days against Spongee's every 2 weeks. Spongee's advantage is iOS requirement (15.6 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Cubic sells 2 in-app purchases, starting at $3.99 per month and Spongee sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Cubic ships an update every 6 days, Spongee every 2 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Cubic | Spongee |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cubic-second-brain-and-reader/id6758525542/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 63 MB | 96 MB |
| Requires iOS | 18.5 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [ARPIT MATHUR](https://appshunter.io/developer/1873364032) | [Wen Jian Kwok](https://appshunter.io/developer/1787882285) |

## What reviewers say

### Cubic

[App page](https://appshunter.io/ios/app/cubic-second-brain-and-reader/id6758525542)

Transform passive reading into active learning by saving articles, organizing content, and creating reviewable flashcards from your highlights. Discover new material through RSS feeds or curated collections and track your learning progress over time.

**Highlights:** Discover content via RSS feeds and curated collections, Save articles and organize into a personal library, Add notes and highlights to saved content, Convert highlights into reviewable flashcards, Track reading habits and learning trends, Organize content for recall

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cubic Pro Monthly | $3.99 | per month |
| Cubic Pro Yearly | $14.99 | per year |


### Spongee

[App page](https://appshunter.io/ios/app/spongee-save-revisit-recall/id6762848812)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |


## Frequently asked questions

### Is Cubic free?

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

### Is Spongee free?

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

### Do Cubic or Spongee have ads?

Neither Cubic nor Spongee shows ads.

### Which is updated more often, Cubic or Spongee?

Cubic ships an update every 6 days, and Spongee every 2 weeks. Most recently, Cubic was updated on October 14, 2026 and Spongee on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*