# DFI vs TRB 2026

The clearest difference is update cadence: TRB 2026 at every 9 days against DFI's every 8 months. 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.

DFI ships an update every 8 months, TRB 2026 every 9 days. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | DFI | TRB 2026 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/trb-2026/id6754019199/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 62 MB | 107 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Deep Foundations Institute, Inc.](https://appshunter.io/developer/1385246120) | [National Academy of Sciences (Apps)](https://appshunter.io/developer/648600968) |

## What reviewers say

### DFI

[App page](https://appshunter.io/ios/app/dfi-finding-common-ground/id1568544738)

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

**In-app purchases:** none


### TRB 2026

[App page](https://appshunter.io/ios/app/trb-2026/id6754019199)

Access the full program for a major transportation conference, including sessions, presentations, and exhibitor information. Plan your schedule, find maps, and stay updated on events. Most features are available offline after initial data download.

**Highlights:** Access all sessions and presentations, Browse by subject area and speaker, Create personalized 'My Program' calendar, View exhibitor information and maps, Offline access to conference data, Stay informed on breaking news and events

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DFI free?

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

### Is TRB 2026 free?

TRB 2026 is free to download, with no in-app purchases.

### Do DFI or TRB 2026 have ads?

Neither DFI nor TRB 2026 shows ads.

### Which is updated more often, DFI or TRB 2026?

DFI ships an update every 8 months, and TRB 2026 every 9 days. Most recently, DFI was updated on October 24, 2026 and TRB 2026 on October 21, 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.*