Huge for my first blades
started making knives this year and the heat treat part scared me the most. this lays out the temps and times so i'm not just winging it. edge holds way better now
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About
This app provides essential heat-treatment schedules for knife making, citing primary sources for verification. It includes detailed information on steel types, hardness targets, failure warnings, and quench guidance. Unlock additional steels and logging features with a one-time purchase.
✓20+ steel schedules
✓Per-use-case HRC targets
✓Named failure-mode warnings
✓Quench-medium guidance
✓Cryo decision matrix
✓Hardness conversions
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What's New in Temper
1.2
July 16, 2026
The number keyboard now has a Done button, so you can dismiss it when you're finished. Thanks to everyone who wrote in about this.
1
In-App Purchases
$6.99
Temper Unlock (lifetime)
All 20 steels, saved profile, multi-session log.
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FAQ
Does Temper have ads?
No, Temper is ad-free. The app explicitly states 'No ads' and the provided data confirms it does not contain advertisements.
What is the cost of Temper?
Temper offers a free tier with three starter steels. Additional steels and features can be unlocked with a one-time in-app purchase of $6.99.
How often is Temper updated?
The latest version of Temper is 1.1, last updated on July 2, 2026. This indicates a recent update, suggesting ongoing development and support.
What devices does Temper support?
Temper is available on iPhone and iPad, as indicated by the supported devices list.
What is the age rating for Temper?
Temper has an age rating of 4+, making it suitable for a wide range of users interested in its utility.
What are the benefits of the Temper Unlock IAP?
The Temper Unlock IAP adds 17 more steel schedules, allows you to save your used profiles and measured HRC, and provides a multi-session log for tracking heat-treat runs.
Where does Temper get its data?
Temper cites primary sources for every schedule, including Knife Steel Nerds articles by Larrin Thomas and steel manufacturer datasheets, with direct links for verification.
Does Temper require an account?
No, Temper does not require an account to use. The app emphasizes privacy and ease of access without the need for user registration.