# Arrowhead Building Supply vs ITB Inbox

The clearest difference is update cadence: ITB Inbox at every 6 weeks against Arrowhead Building Supply's every 18 months. Arrowhead Building Supply's advantage is iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Arrowhead Building Supply ships an update every 18 months, ITB Inbox every 6 weeks. The most recent releases landed on October 26, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Arrowhead Building Supply | ITB Inbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.4 (7 ratings)](https://appshunter.io/ios/app/itb-inbox/id6741428619/reviews)** |
| Number of ratings | — | **7** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 23 MB | 127 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Epicor](https://appshunter.io/developer/578272020) | [PlanHub](https://appshunter.io/developer/1631169352) |

## What reviewers say

### Arrowhead Building Supply

[App page](https://appshunter.io/ios/app/arrowhead-building-supply/id1344976011)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Arrowhead Building Supply free?

Arrowhead Building Supply is free to download, with no in-app purchases.

### Is ITB Inbox free?

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

### Do Arrowhead Building Supply or ITB Inbox have ads?

Neither Arrowhead Building Supply nor ITB Inbox shows ads.

### Which is updated more often, Arrowhead Building Supply or ITB Inbox?

Arrowhead Building Supply ships an update every 18 months, and ITB Inbox every 6 weeks. Most recently, Arrowhead Building Supply was updated on October 26, 2026 and ITB Inbox on October 20, 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.*