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Thermal Buddy: Hiker's Logbook
Stop guessing what to wear. Your past hikes have the answer.
Thermal Buddy is a personal gear logbook for hikers, backpackers and trail runners. After each outing, log what you wore and slept in, the conditions, and how you felt, from Too Cold to Just Right to Too Hot. Before your next trip, search your past logs by temperature and instantly see what worked and what didn't. No account required — your logs live on your device and sync privately via iCloud. Free for up to 8 logs; the yearly plan includes a 1-month free trial.
Top comment
Hi Product Hunt! I'm Eiji — a hiker, backpacker, and solo developer. Thermal Buddy is my first app, and it exists because of a cycle I could never break. I call it the freeze-regret cycle. You pack based on a vague memory of "what worked last time." You get it wrong. You spend the night too cold to sleep — or you hike drenched in sweat under one layer too many. You swear you'll remember next time. Then a year later, standing over your gear pile the night before a trip, you're guessing all over again. Freeze. Regret. Repeat. Thermal Buddy breaks that cycle. After each outing you log what you wore and slept in, the conditions, and how you felt — on a five-point scale from Too Cold to Too Hot. Before the next trip, you search your own past logs by temperature and instantly see what actually kept you comfortable and what didn't. Your memory stops being the bottleneck. A few things I'm proud of that didn't fit the short description: • Scene-based logging. What keeps you warm while moving is completely different from what keeps you warm asleep — so you log per scene (Active, Rest, Sleep, Transit) instead of one blurry summary of the whole day. • Search ranked by comfort. Set a temperature range and your best past setups rise to the top. It's a personal, field-tested database — not generic "it's 10°C, wear a jacket" advice that ignores your gear and how hot or cold you personally run. • Multi-day trips. Group related logs into a single trip — ideal for thru-hikes, hut-to-hut routes, and weekend backpacking. • Yours, and private. No account needed. Your logs live on your device and sync via iCloud. Purchases run through the App Store, and the app collects only anonymous, non-personal usage signals to help me improve it — nothing tied to you or your logs. It's free for up to 8 logs, so you can feel the "aha" of searching your own history before paying a cent. Unlimited is a yearly plan (with a 1-month free trial), or a one-time Lifetime unlock if you'd rather buy once and own it forever. I built this for myself and shipped it because other hikers kept asking for it. If you've ever lived the freeze-regret cycle, I'd genuinely love to hear how you've dealt with it — and what would make Thermal Buddy more useful for you. Happy trails, Eiji
About Thermal Buddy: Hiker's Logbook on Product Hunt
“Stop guessing what to wear. Your past hikes have the answer.”
Thermal Buddy: Hiker's Logbook was submitted on Product Hunt and earned 3 upvotes and 3 comments, placing #103 on the daily leaderboard. Thermal Buddy is a personal gear logbook for hikers, backpackers and trail runners. After each outing, log what you wore and slept in, the conditions, and how you felt, from Too Cold to Just Right to Too Hot. Before your next trip, search your past logs by temperature and instantly see what worked and what didn't. No account required — your logs live on your device and sync privately via iCloud. Free for up to 8 logs; the yearly plan includes a 1-month free trial.
On the analytics side, Thermal Buddy: Hiker's Logbook competes within iOS, Outdoors and Hiking — topics that collectively have 118.7k followers on Product Hunt. The dashboard above tracks how Thermal Buddy: Hiker's Logbook performed against the three products that launched closest to it on the same day.
Who hunted Thermal Buddy: Hiker's Logbook?
Thermal Buddy: Hiker's Logbook was hunted by Eiji Akiyama. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Thermal Buddy: Hiker's Logbook including community comment highlights and product details, visit the product overview.