# Technology Readiness Levels — TRL definitions reference

> Reference for Department of Defense and NASA Technology Readiness Levels (TRLs). (iPhone/iPad app by Russell Shannon.)

- Source: https://appshunter.io/ios/app/technology-readiness-levels/id644843941 (this page in markdown: same URL + `.md`)
- Developer: [Russell Shannon](https://appshunter.io/developer/505317310)
- Category: Productivity, Reference
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English
- Released: 2013-07-08
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/technology-readiness-levels/id644843941/reviews.md

## What is Technology Readiness Levels?

This is a quick-reference app for the Department of Defense and NASA Technology Readiness Levels (TRLs). 

It features definitions for both DoD and NASA!

For each TRL, the app includes:

*Definition
*Description
*Supporting information (DoD only)
*SETR Process alignment (DoD only)

Everyone needs a reminder now and then. What's the difference between TRL 5 and TRL 6? Is your invention at TRL 4 or at TRL 5? What's the difference between TRL 1 and TRL 2?

All ThinChip Software apps are now available free of charge!

## Key features

- DoD and NASA TRL definitions
- Detailed descriptions for each TRL
- Supporting information (DoD)
- SETR Process alignment (DoD)
- Quick reference guide


## Frequently asked questions about Technology Readiness Levels

### What are Technology Readiness Levels (TRLs)?

TRLs are a system used to assess the maturity of a particular technology. They range from TRL 1 (basic principles observed) to TRL 9 (actual system proven through successful mission operations).

### Does Technology Readiness Levels have ads?

No, Technology Readiness Levels is ad-free. All ThinChip Software apps are currently available free of charge.

### What information is available for each TRL?

For each TRL, the app provides a definition, a description, and for DoD specific TRLs, supporting information and SETR Process alignment.

### Is Technology Readiness Levels available on Android?

Based on the provided data, Technology Readiness Levels is currently only supported on iPhone devices.

### How often is Technology Readiness Levels updated?

The app was last updated on January 6, 2026, with version 4.0. This indicates a recent update, suggesting ongoing maintenance and potential future improvements.

### What is the age rating for Technology Readiness Levels?

Technology Readiness Levels has an age rating of 4+, making it suitable for a wide range of users.

### Can I use Technology Readiness Levels offline?

The app functions as a quick-reference guide, and its core definitions and descriptions are likely accessible without an internet connection.

### What are the differences between DoD and NASA TRLs?

The app specifically highlights definitions for both DoD and NASA TRLs, and includes additional 'Supporting information' and 'SETR Process alignment' unique to DoD TRLs.

## Version history (last 5 releases)

### 4.0 — 2026-01-06

Updates and bug fixes.

### 3.9 — 2022-10-29

Performance improvements and updates.

### 3.8 — 2021-10-01

Some under-the-hood code improvements and updates.

### 3.7 — 2020-12-28

Some under-the-hood code improvements for iPhone 12.

### 3.6 — 2020-05-30

Minor code updates and improvements.

## Apps similar to Technology Readiness Levels

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [KeePass Touch](https://appshunter.io/ios/app/keepass-touch/id966759076) | 3.6 (339) | Free | Productivity |
| [SplashID Safe Password Manager](https://appshunter.io/ios/app/splashid-safe-password-manager/id284334840) | 3.4 (1,018) | Free | Productivity |
| [Charty for Shortcuts](https://appshunter.io/ios/app/charty-for-shortcuts/id1494386093) | 4.7 (327) | Free | Productivity |
| [Supersense - AI for Blind](https://appshunter.io/ios/app/supersense-ai-for-blind/id1484547836) | 4.2 (266) | Free | Productivity |
| [Password Manager & Generator](https://appshunter.io/ios/app/password-manager-and-generator/id1451571399) | 4.5 (1,397) | Free | Productivity |
| [Password Manager - Protect](https://appshunter.io/ios/app/password-manager-protect/id1474193684) | 4.1 (312) | Free | Productivity |

## More apps by Russell Shannon

- [DoD Systems Engineering](https://appshunter.io/ios/app/dod-systems-engineering/id505317207)
- [My Comic Books](https://appshunter.io/ios/app/my-comic-books/id528886127)
- [Basic Math Rules](https://appshunter.io/ios/app/basic-math-rules/id536941115)
- [Earned Value Management](https://appshunter.io/ios/app/earned-value-management/id1060154603)

All apps by Russell Shannon: https://appshunter.io/developer/505317310

## Related topics

[definitive technology](https://appshunter.io/ios/topics/definitive-technology) · [seqr technology](https://appshunter.io/ios/topics/seqr-technology) · [dqt technology](https://appshunter.io/ios/topics/dqt-technology) · [raxar technology corporation](https://appshunter.io/ios/topics/raxar-technology-corporation) · [bowen technology llc](https://appshunter.io/ios/topics/bowen-technology-llc)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*