Built for experimental owners, builders and light-sport repairmen first
Also for certificated aircraft and S-LSA
A logbook records what was done.Airmass makes it answer questions.
Is it legal to fly? What's coming due? May I sign my own inspection? Paper logbooks can't tell you. Airmass reads every entry against the regulations in force on its date, and answers with the entry and the rule behind it.
- Mac and iPad
- No account
- Your records never go to our servers
How it gets the answer
Four layers between your records and an answer.
Your records go in at the top. The regulations, written as checked code, sit underneath. The answer comes back with its sources.
Your entries, scans, equipment and meters go into one record store. Nothing is edited; a correction is a new entry.For you: one place for every record, and logbooks you can print.
Each regulation is written as code in Lean, a language that checks proofs. Every edition keeps the date it took effect, back as far as the published record reaches.For you: the rules as they were on any date, not a typed-in interval.
Before a rule ships, thousands of test cases run against it, including cases checked by hand. Any difference stops the release.For you: a rule change cannot quietly change an answer.
A small, locked and signed engine decides every answer. The same records always give the same answer.For you: an answer you can show a buyer, an inspector or the FAA.
What you do
Four steps.No more reading every page.
Add your records
Scan old logbook pages or enter new work.
See what's due
One headline for the whole aircraft, with the item named.
Sign the entry
Airmass writes the wording. Sign with your passkey or in ink.
Print the logbook
Airframe, engine and propeller books you keep.
In the app
The answer, not a pile of pages.
- NOAA 406 beacon registration30 Nov 2026
- Navigation database3 Dec 2026
- Condition inspection31 Jan 2027
- ELT battery30 Apr 2027
- Transponder test30 Jun 2027
- Registration30 Jun 2030
From the records only. The pilot in command still checks the aircraft's physical condition before each flight.
Can I sign the condition inspection? · Amateur-built, limitations issued 2018, owner holds a light-sport repairman certificate with an airplane inspection rating
Your operating limitations name only the builder and an FAA-certificated mechanic. They do not name a light-sport repairman.
- Ask your FSDO for amended operating limitations, or send the request through the FAA AWC portal.
- The FAA reissues the full set. Airmass reads all of it again when it arrives.
Sources: FAA MOSAIC maintenance FAQ; AC 65-32B, paragraph 2.6.3; your aircraft's operating limitations.
Pre-buy audit
Buying or selling?One click.
See what the records prove, and what they don't, with the source for each item. Export it for the buyer or your mechanic.
AD search 22 Oct 2026
- NoncomplianceTransponder test
Last test 11 Sep 2024; due by 30 Sep 2026.
14 CFR 91.413(a) · entry of 11 Sep 2024, airframe log p. 22 - IncompleteRecord gap
No records from 15 Mar 2013 to 18 Aug 2019. Shown as a gap, not as compliance.
Airframe log pp. 3–4 - IncompleteELT battery
Two entries give different expiry dates: Oct 2026 and Nov 2026.
14 CFR 91.207(c) · entries of 2 Nov 2024 and 9 Nov 2024 - ComplianceCondition inspection
Done 14 Nov 2026 by a person the limitations name.
Operating limitations ¶ 26 · airframe log p. 14
Why Airmass
Other apps remind you.Airmass proves it.
Experimental first
Reads your operating limitations and tells you if you may sign your own inspection. Certificated aircraft are covered too.
Rules as they were
Each entry is checked against the regulations in force on the day it was made. We have editions back to 1997 for the experimental rules, and are adding the rest.
Guesses
Every answer shows its record and rule. Missing records show as missing, never as compliance.
You own your data
Your records stay yours.
Never on our servers
On your Mac and iPad, synced through your own iCloud if you want. No account.
A logbook you hold
Real printed airframe, engine and propeller books.
Yours if you stop paying
Everything stays available to open, print and export.
Pricing
$99 a year, per aircraft
Free to try with a sample aircraft · Free during the beta