# ITB Inbox vs Sub Pro App Inc.

The clearest difference is rating: Sub Pro App Inc. at 5.0 against ITB Inbox's 2.4. Sub Pro App Inc. also leads on update cadence (every 5 days vs every 6 weeks) and device support (3 vs 1). On price, ratings volume, 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.

Sub Pro App Inc. holds the better App Store score, 5.0 against 2.4. Both are backed by a comparable volume of ratings — 7 and 4 respectively.

ITB Inbox ships an update every 6 weeks, Sub Pro App Inc. every 5 days. The most recent releases landed on October 20, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ITB Inbox | Sub Pro App Inc. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (7 ratings)](https://appshunter.io/ios/app/itb-inbox/id6741428619/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/sub-pro-app-inc/id6756586323/reviews)** |
| Number of ratings | **7** | 4 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | Free | Free |
| Size | 127 MB | 17 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [PlanHub](https://appshunter.io/developer/1631169352) | [Jonathan Marquez Depaz](https://appshunter.io/developer/1861554319) |

## What reviewers say

### ITB Inbox

[App page](https://appshunter.io/ios/app/itb-inbox/id6741428619)

Manage Invitation to Bid (ITB) emails from PlanHub efficiently. Receive instant notifications for new bids, view project details, and communicate directly with General Contractors. Streamline your construction bidding process on the go.

**Highlights:** Instant ITB notifications, View project details and files, Direct communication with contractors, Quick bid decision making, Team ITB assignment, Integrated PlanHub messaging

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

**In-app purchases:** none


### Sub Pro App Inc.

[App page](https://appshunter.io/ios/app/sub-pro-app-inc/id6756586323)

This app connects general contractors with verified trade and labor subcontractors in the construction industry. It facilitates project posting, contractor credential review, and direct messaging for efficient hiring and team building.

**Highlights:** Verified contractor profiles, Real-time messaging, Project posting and application, Review and rating system, Specialty trade matching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ITB Inbox free?

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

### Is Sub Pro App Inc. free?

Sub Pro App Inc. is free to download, with no in-app purchases.

### Which has better reviews, ITB Inbox or Sub Pro App Inc.?

Sub Pro App Inc. is rated higher. ITB Inbox averages 2.4 out of 5 from 7 ratings, while Sub Pro App Inc. averages 5.0 from 4 ratings.

### Do ITB Inbox or Sub Pro App Inc. have ads?

Neither ITB Inbox nor Sub Pro App Inc. shows ads.

### Which is updated more often, ITB Inbox or Sub Pro App Inc.?

ITB Inbox ships an update every 6 weeks, and Sub Pro App Inc. every 5 days. Most recently, ITB Inbox was updated on October 20, 2026 and Sub Pro App Inc. on October 18, 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.*