TubeLog

Log your amps, tubes, and rolling sessions. Track usage hours, get replacement reminders, and remember which tube sounded best where. No account, no subscription.

The tube-rolling log built for vacuum tube audio enthusiasts. Track every piece of gear, every tube, and every listening session — in one place.

No more scattered notes about which tube you tried in which amp, or guessing how many hours are on a tube. TubeLog is a purpose-built iOS app for cataloging your gear, your tube collection, and the tube-rolling sessions that connect them.

【What You Can Do】

▷ Gear Catalog Log every piece of your rig: preamps, integrated amps, power amps, DACs, CD players, turntables, phono stages, speakers, headphone amps, and more. Track brand, model, purchase price, year, a photo, and status (active, stored, or sold off). Free up to 10 pieces.

▷ Tube Catalog Catalog every tube you own: type (12AX7, 12AU7, 6SN7, EL34, KT88, 300B, or a custom type), brand, country of origin, label/etch code, purchase price, year, condition, and status (active, spare, or retired). Free up to 20 tubes.

▷ Rolling Log Record which tubes went into which amp — with a slot label per tube (like "V1 Driver" or "Power L/R") — plus the track or source you listened to, your volume setting, a star rating, and a note on how it compared to your last roll.

▷ Session Timer Start a timer while you listen. Stop it when you're done, and the session duration is filled into your rolling log automatically.

▷ Usage Tracking & Replacement Reminders Every tube's cumulative usage hours are tracked automatically from your rolling logs. Set a replacement reminder threshold per tube and get a local notification the moment it's crossed — no more guessing when a tube is due for a check.

▷ Smart Suggestions Brand, country, and condition fields suggest values you've typed before, plus common presets, so you're not retyping "Mullard" or "UK" every time.

▷ Share Cards Generate three kinds of shareable cards: your current rig, a tube-rolling comparison (pick 2 or more logs; the card shows up to 4), and your best-rated tubes ranked (shown once a gear item has 3 or more rated logs). Perfect for posting to r/audiophile or any forum. Free with a "Logged with TubeLog" watermark — Pro removes it.

▷ Collection Stats See your collection at a glance: total gear and tubes, total listening hours logged, total money invested, breakdowns by category and status, your most-used tubes, and rolling log activity over the last 6 months.

▷ Backup & Export Export your entire collection — gear, tubes, rolling logs, and photos — as a ZIP backup (CSV included inside the archive), then import it on a new device to restore. Available on the free plan. If you import more gear or tubes than the free limits allow, extras are skipped until you upgrade to Pro.

【Who It's For】 · Tube rollers who want to remember which tube sounded best in which amp · Collectors tracking a growing shelf of NOS and vintage tubes · Anyone who's ever wondered "how many hours are on this tube?" · Audiophiles who want their rig — and their reasoning — recorded, not just remembered

【Your Data Stays on Your Device】 Everything is stored locally on your iPhone. No account required, no cloud sync, and no internet connection needed for everyday use.

【Pricing】 · Free: up to 10 pieces of gear and 20 tubes. Rolling logs, the session timer, replacement reminders, share cards (with watermark), collection stats, and ZIP backup export/import are always free. · TubeLog Pro (one-time purchase): unlimited gear and tubes, plus watermark-free share cards. Pay once, yours forever.

Developer: Kore Apps Contact: support@kore-apps.com