Best Altimeter for L1 Certification (2026)

#altimeters#L1#gear-review#dual-deploy

You need a dual-deploy altimeter for your L1 certification flight. The problem isn't finding one — it's choosing between a dozen options at wildly different price points, with feature lists that mean nothing until you've actually flown one.

This guide compares the four most popular altimeters for new L1 flyers in 2026, based on actual availability, real-world reliability, and what matters vs. what's marketing.

Quick Comparison

| | Eggtimer Quark | Missile Works RRC2+ | Altus Metrum EasyMini | Featherweight Blue Jay 2 | |---|---|---|---|---| | Price | $20 (kit) / $25 (Easy Kit) | ~$55 (assembled) | ~$80 (assembled) | $90 (standard) / $105 (Plus) | | Outputs | 2 (drogue + main) | 2 (drogue + main) | 2 (drogue + main) | 2 (drogue + main) | | Data logging | Yes (beep-back + serial) | Yes (beep-back or LCD) | Yes (USB download) | Yes (Bluetooth app) | | Configuration | Onboard jumpers | DIP switches | USB + software | Phone app (iOS/Android) | | Size | ~1.7" × 0.7" (44mm × 18mm) | ~2.6" × 1.0" | ~1.5" × 0.8" | ~2.0" × 0.8" | | Weight | ~7g | ~8g | ~6.5g | ~10g | | Assembly required | Yes (soldering) | No | No | No | | Battery | 1S–4S LiPo (2S recommended) | 9V or 1S LiPo | 3.7V–12V | 1S LiPo | | Smart detection | Barometric | Barometric | Barometric | 6DOF IMU + barometric | | Best for | Absolute budget builds | Reliability-first flyers | Tiny AV bays | Premium UX |

The Breakdown

Eggtimer Quark — Best Value ($20)

The Quark is Eggtimer Rocketry's entry-level dual-deploy altimeter. At $20 for the kit (or $25 for the Easy Kit with SMT parts pre-soldered), it's the cheapest reliable dual-deploy controller on the market — by a wide margin.

Pros:

  • Dead simple — three jumpers set your main altitude and drogue timing, no software needed
  • Dual outputs with short-circuit protection
  • Tiny (44mm × 18mm) — fits a 24mm coupler tube easily
  • Can test-fire deployment channels before flight
  • Beeps out apogee after landing for quick field readout

Cons:

  • Kit requires soldering (SMT parts, but Easy Kit version has SMT pre-mounted)
  • Only four main altitude options (300, 500, 800, 1000 ft) via jumpers
  • No WiFi or app — data readout is beep codes or serial output with a USB adapter ($5)
  • No accelerometer — barometric only (fine for 99% of L1 flights)

Verdict: At $20, this is an absurd bargain. The jumper-based setup means there's literally nothing to misconfigure in software — set it and forget it. The Easy Kit version ($25) makes assembly trivial if you don't want to solder SMT parts.

Want WiFi configuration and in-field data download? The Eggtimer Quantum ($40 kit / $45 Easy Kit) adds WiFi programming, arming, and data download via any phone browser, plus the same two deployment channels. It's the best upgrade if the Quark feels too bare-bones.

Missile Works RRC2+ — Most Reliable ($55)

The RRC2+ is the spiritual successor to the legendary StratoLoggerCF (RIP). It's a pre-built, no-fuss altimeter that's been flying in thousands of rockets since its release.

Pros:

  • Pre-assembled — zero build time
  • Tiny and light (fits in the smallest AV bays)
  • DIP switch programming — nothing to forget, nothing to break
  • Multi-flight recording
  • The RRC3+ ($75) adds a third output and telemetry capability if you upgrade later

Cons:

  • DIP switch programming is simple but less flexible than WiFi/app
  • Beep-back data readout is tedious (LCD display sold separately)
  • No accelerometer

Verdict: The "just works" option. If you don't want to think about your altimeter and just want it to fire charges reliably, this is it. DIP switches mean there's nothing to configure wrong in software.

Altus Metrum EasyMini — Smallest ($80)

The EasyMini is absurdly small — it fits in AV bays where nothing else will. It's the go-to for minimum-diameter rockets and tight builds.

Pros:

  • Incredibly tiny (1.5" × 0.8", fits in 24mm airframes with room to spare)
  • Only 6.5g — lightest altimeter on this list
  • USB data download with real software (not beep codes)
  • TeleMega/TeleMetrum ecosystem if you upgrade later
  • Smart flight detection (won't fire on the ground)

Cons:

  • Requires a computer + USB cable for programming and data download
  • More expensive than functionally equivalent options
  • Occasionally out of stock (Altus Metrum is a small operation)
  • Linux-first software; Windows/Mac work but are less polished

Verdict: Buy this if you're building a minimum-diameter rocket or have a very tight AV bay. Otherwise, you're paying a $60 premium over the Quark for size alone.

Featherweight Blue Jay 2 — Best UX ($90)

The Blue Jay 2 is the most modern altimeter on this list — Bluetooth phone app for everything: configuration, arming status, flight data download, and analysis. The standard model is $90; the Blue Jay 2 Plus ($105) adds pre-apogee output programming for staging.

Pros:

  • Phone app is genuinely excellent (iOS + Android)
  • Built-in magnetic switch (no external switch needed)
  • 6DOF inertial navigation — smarter apogee detection in edge cases
  • Tiny form factor with built-in switch
  • Bluetooth auto-downloads flight data when you walk up to the rocket after landing
  • New budget model (Blue Jay 2-) available for $75 with ±32G accelerometer

Cons:

  • $90 is more than the Quark + RRC2+ combined
  • Phone app dependency (can't configure without it)
  • Relatively new — less community history than Eggtimer/Missile Works
  • If your phone dies at the field, you can't change settings

Verdict: The best user experience on this list by a mile. At $90 direct from Featherweight (note: some retailers mark up to ~$134), it's a reasonable premium for the "walk up, phone auto-downloads" workflow. But for a first L1 flight, the extra spend doesn't change the outcome — your rocket either deploys correctly or it doesn't, and a $20 Quark does that just as reliably.

What About the StratoLoggerCF?

You'll see it recommended everywhere in forum posts from 2020–2023. It was the default recommendation for years. The problem: PerfectFlite produces them in extremely limited batches and they sell out in hours. As of mid-2026, they're effectively unavailable for new buyers. Don't plan a build around one unless you already own it or get lucky on a restock.

My Recommendation

For most first-time L1 flyers:

  1. Want simplest possible setup? → Eggtimer Quark ($20 kit / $25 Easy Kit). Jumper config, no software needed.
  2. Want WiFi convenience? → Eggtimer Quantum ($40 kit / $45 Easy Kit). WiFi config and data download from your phone browser.
  3. Don't want to build anything? → Missile Works RRC2+ ($55). Pre-built, dead simple DIP switches.
  4. Tight AV bay? → EasyMini ($80). Unmatched size at 1.5" × 0.8".
  5. Want premium UX and budget isn't tight? → Blue Jay 2 ($90). Best app experience.

For your first L1 flight, I'd spend the least amount possible on the altimeter and put the savings into a backup (two altimeters is always better than one fancy one). A Quark primary + RRC2+ backup costs about $75 total and gives you redundancy — less than a single Blue Jay.

Regardless of which altimeter you buy, always ground-test your charges before flight day. Hook up the altimeter, arm it, and simulate a flight (some altimeters have a "test fire" mode). If you can't ground-test at home, do it at the field before loading the rocket on the rail.

Where to Buy

Setting up dual deployment for the first time? Read our step-by-step dual deployment guide next.