# ErgoBlue vs TwoTenDegrees

ErgoBlue and TwoTenDegrees both sit at 5.0 stars, but that hides the real split: 100% of ErgoBlue's written reviews are positive against 0% of TwoTenDegrees's. ErgoBlue also leads on iOS requirement (12.0 vs 17.0). TwoTenDegrees's advantage is in-app purchases (none vs 4) and update cadence (every 9 days vs every 4 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. ErgoBlue sells 4 in-app purchases, starting at $7.99 per month. TwoTenDegrees asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ErgoBlue against 5.0 for TwoTenDegrees. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 100% of ErgoBlue's written reviews are positive against 0% of TwoTenDegrees's.

ErgoBlue ships an update every 4 months, TwoTenDegrees every 9 days. Both last shipped on September 9, 2026.

## The numbers

| Metric | ErgoBlue | TwoTenDegrees |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/ergoblue/id1481779003/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/twotendegrees/id6504466524/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1.7 GB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929) | [Scott Sloan](https://appshunter.io/developer/1752409905) |

## What reviewers say

### ErgoBlue

[App page](https://appshunter.io/ios/app/ergoblue/id1481779003)

This aviation app provides pilots with real-time ship location data and an automated distress messaging system for emergencies over water. It enhances situational awareness, reduces pilot workload, and aids in faster rescue operations.

**Highlights:** Real-time AIS ship position data, Automated voice distress message, Distress text data message via DSC, Reduces pilot task saturation, Increases pilot situational awareness, Assists with ditching procedures, Instrument approach to ditching

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Special Flight Safety Offer | $7.99 | per month |
| Ergo Blue Weekly Subscription | $49.99 | per 7 days |
| ErgoBlue Monthly Subscription | $87.99 | per month |
| ErgoBlue Yearly Subscription | $999.99 | per year |


### TwoTenDegrees

[App page](https://appshunter.io/ios/app/twotendegrees/id6504466524)

This utility calculates the impossible turn, a critical maneuver for pilots in case of engine failure. It provides precise calculations to help pilots determine the safest return to the runway.

**Highlights:** Impossible turn calculation, Engine failure scenario, Runway return planning, Pilot utility tool

**In-app purchases:** none


## Frequently asked questions

### Is ErgoBlue free?

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

### Is TwoTenDegrees free?

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

### Which has better reviews, ErgoBlue or TwoTenDegrees?

ErgoBlue and TwoTenDegrees are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ErgoBlue or TwoTenDegrees have ads?

Neither ErgoBlue nor TwoTenDegrees shows ads.

### Which is updated more often, ErgoBlue or TwoTenDegrees?

ErgoBlue ships an update every 4 months, and TwoTenDegrees every 9 days. Most recently, ErgoBlue was updated on September 9, 2026 and TwoTenDegrees on September 9, 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.*