# Stackby vs QuantumShelf

The clearest difference is in-app purchases: Stackby at none against QuantumShelf's 4. Stackby also leads on iOS requirement (12.0 vs 18.0). QuantumShelf's advantage is update cadence (weekly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. QuantumShelf sells 4 in-app purchases, starting at $4.99 per month. Stackby asks for nothing beyond the download.

Stackby ships an update every 6 weeks, QuantumShelf weekly. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Stackby | QuantumShelf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (42 ratings)](https://appshunter.io/ios/app/stackby/id1528175767/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 73.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 39 MB | 45 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Relytree Technologies Pvt. Ltd](https://appshunter.io/developer/1528175769) | [Zack Halsey](https://appshunter.io/developer/1863290419) |

## What reviewers say

### Stackby

[App page](https://appshunter.io/ios/app/stackby/id1528175767)

This app provides a flexible database platform to organize any type of information, from customer leads to project tasks and marketing campaigns. It allows real-time creation, management, and collaboration on databases from any mobile device, offering over 300 pre-built templates for quick setup.

**Highlights:** Organize information, Manage tasks and projects, Manage marketing campaigns, Real-time collaboration, 300+ pre-built templates, Cross-platform accessibility

**Features:** macOS Compatibility

**In-app purchases:** none


### QuantumShelf

[App page](https://appshunter.io/ios/app/quantumshelf-home-inventory/id6756856769)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Family Monthly | $7.99 | per month |
| Pro Annual | $49.99 | per year |
| Family Annual | $79.99 | per year |


## Frequently asked questions

### Is Stackby free?

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

### Is QuantumShelf free?

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

### Do Stackby or QuantumShelf have ads?

Neither Stackby nor QuantumShelf shows ads.

### Which is updated more often, Stackby or QuantumShelf?

Stackby ships an update every 6 weeks, and QuantumShelf weekly. Most recently, Stackby was updated on October 16, 2026 and QuantumShelf on October 7, 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.*