# Stack Flow vs PRIME DROP

The clearest difference is in-app purchases: Stack Flow at none against PRIME DROP's 1. Stack Flow also leads on update cadence (daily vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. PRIME DROP sells 1 one-off in-app purchase. Stack Flow asks for nothing beyond the download.

Stack Flow ships an update daily, PRIME DROP every 3 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | Stack Flow | PRIME DROP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 129 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dipayon Debnath Dip](https://appshunter.io/developer/1566993708) | [KANTA KOKONNO](https://appshunter.io/developer/6800746480) |

## What reviewers say

### Stack Flow

[App page](https://appshunter.io/ios/app/stack-flow-soap-cutting/id6793167382)

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

**In-app purchases:** none


### PRIME DROP

[App page](https://appshunter.io/ios/app/prime-drop/id6805800981)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Stack Flow free?

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

### Is PRIME DROP free?

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

### Do Stack Flow or PRIME DROP have ads?

Both Stack Flow and PRIME DROP show ads.

### Which is updated more often, Stack Flow or PRIME DROP?

Stack Flow ships an update daily, and PRIME DROP every 3 weeks. Most recently, Stack Flow was updated on October 29, 2026 and PRIME DROP on October 29, 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.*