# Inbox Pro vs Instant Testing

The clearest difference is device support: Instant Testing at 3 against Inbox Pro's 1. Instant Testing also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 20, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Inbox Pro | Instant Testing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (40 ratings)](https://appshunter.io/ios/app/inbox-pro-email-for-gmail/id6469538263/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 70 MB | 79 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ChromaticApp Ltd](https://appshunter.io/developer/1709658156) | [Clapptron Technologies Private Limited](https://appshunter.io/developer/1446260957) |

## What reviewers say

### Inbox Pro

[App page](https://appshunter.io/ios/app/inbox-pro-email-for-gmail/id6469538263)

This email client prioritizes your privacy and security for Gmail accounts. It offers robust protection through data-free access, biometric locks, and encrypted communication, ensuring your sensitive information remains safe.

**Highlights:** Data-free email access, Fingerprint/Face ID lock, Encrypted communication, Passcode protection, Seamless Gmail integration, User-friendly interface

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Instant Testing

[App page](https://appshunter.io/ios/app/instant-testing/id6587570917)

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

**In-app purchases:** none


## Frequently asked questions

### Is Inbox Pro free?

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

### Is Instant Testing free?

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

### Do Inbox Pro or Instant Testing have ads?

Neither Inbox Pro nor Instant Testing shows ads.

### Which is updated more often, Inbox Pro or Instant Testing?

Inbox Pro ships an update every 2 months, and Instant Testing every 2 months. Most recently, Inbox Pro was updated on August 20, 2026 and Instant Testing on September 28, 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.*