# ApiClient vs flex

The clearest difference is in-app purchases: flex at none against ApiClient's 1. flex also leads on ads (none vs shown) and update cadence (every 5 days vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. ApiClient sells 1 one-off in-app purchase. flex asks for nothing beyond the download.

ApiClient ships an update every 3 months, flex every 5 days. The most recent releases landed on October 30, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ApiClient | flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/apiclient-rest-api-tester/id1595150293/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 18 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ajaykumar Valand](https://appshunter.io/developer/1595150295) | [Guilherme Ferraz](https://appshunter.io/developer/1623504048) |

## What reviewers say

### ApiClient

[App page](https://appshunter.io/ios/app/apiclient-rest-api-tester/id1595150293)

Test and manage REST APIs directly from your phone. Import, edit, and export Postman collections, send Firebase notifications, and format JSON requests on the go. Save API requests and responses for easy access and sharing.

**Highlights:** Create HTTP/HTTPS requests, Import/export Postman collections, Send Firebase notifications, Format JSON requests, Save and share API requests/responses, Manage API history

**In-app purchases (1)**

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


### flex

[App page](https://appshunter.io/ios/app/flex-1-learn-tailwind/id6742805433)

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

**In-app purchases:** none


## Frequently asked questions

### Is ApiClient free?

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

### Is flex free?

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

### Do ApiClient or flex have ads?

ApiClient shows ads; flex does not.

### Which is updated more often, ApiClient or flex?

ApiClient ships an update every 3 months, and flex every 5 days. Most recently, ApiClient was updated on October 30, 2026 and flex on September 22, 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.*