HUUM vs Penombra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HUUM
Control your sauna remotely with this app. Schedule heating times and receive notifications when your sauna reaches the desired temperature, ensuring a perfectly heated experience upon arrival.
- Remote sauna heating
- Scheduled heating times
- Calendar bookings
- Temperature notifications
- Mobile control
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Your sauna, ready when you are. The HUUM app puts full control of your sauna in your pocket. Heat it up on your way home, fine-tune the temperature from the bench, and keep an eye on every session wherever you are. WHAT YOU CAN DO • Start, stop, and adjust your sauna remotely • Set the exact target temperature and session duration • Schedule sessions by day, time, and temperature, including recurring bookings • Watch live status, current and target temperature, and heating progress • Manage multiple saunas from a single view • Track your sauna hours and browse your full session history • Get clear, real-time alerts for doors, connection, and safety BUILT FOR SAFETY Remote start is enabled only when your sauna's safety is confirmed through the UKU control panel, so you stay in control at all times. Works with HUUM saunas equipped with the UKU controller and a Wi-Fi connection. Less fiddling. More leil.
Penombra
Explore stunning photography portfolios featuring natural landscapes and architectural spaces. Each image includes a field note with a story about its creation. Preview photos in AR, cast to a TV, and create printable zines.
- Curated galleries
- Field notes with stories
- AR print previews
- Digital Frame mode
- AirPlay casting
- Visually similar photo suggestions
- Printable PDF zines
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Above ground and below, wherever light and space invite exploration. Penombra is photographer Jim Nutty's portfolio, made for iPhone and iPad — spanning natural landscapes and architectural spaces. Every photograph comes with a field note: a short story about where it was taken, what it is, and the things the camera couldn't capture. Designed to let the photography speak. Clean, dark, distraction-free. Features • Two curated galleries — The Open World and Architecture & The Underground • A field note alongside every photograph • Preview any photograph as a real print on your wall in AR — twelve sizes, placed at actual scale • Digital Frame mode — let the gallery play ambient on your iPad, with three Ken Burns motion intensities • Cast to a TV via AirPlay; control the slideshow from the Lock Screen with interactive transport buttons • "More Like This" — visually similar photographs surfaced on-device • Photographer's Tools — opt-in composition overlays and capture info • Save any field note + photograph as a printable PDF zine • Favorites, user-created Collections, and a personal Year in Review • Home-screen photo widgets in four sizes, including Lock Screen • Limited edition prints — 25 per image, no exceptions • Direct contact for print and licensing inquiries
Screenshots
Verdict
The clearest difference is rating: Penombra at 5.0 against HUUM's 2.3. HUUM's advantage is ratings volume (30 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Penombra holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: HUUM has 30 ratings behind it against 2, so its average is the more settled of the two.
HUUM ships an update monthly, Penombra every 3 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | HUUM | Penombra |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (30 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 10.6% of reviews | — |
| Number of ratings | 30 — better | 2 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 66 MB | 14 MB |
| Age rating | 17+ | 4+ |
| Developer | HUUM | Samuel James Nutty |
Customer experience
HUUM
Penombra
Bugs and requests
HUUM
Reported bugs
21 issues- App randomly switches to Estonian/Finnish/Swedish
- Temperature control stops working after updates
- Scheduler/timer functionality broken
- Remote start feature randomly disables
- App won't open or becomes unresponsive
Show 16 moreShow fewer
- Login loops and credential rejection
- Door sensor falsely reports 'door open'
- Sauna turns off mid-heating without reason
- Light controls unresponsive or delayed
- Calendar/scheduling closes app
- Password reset emails don't work
- App incompatible with latest iOS versions
- Notifications not working on newer phones
- Sauna ID retrieval issues
- Temperature scroll functionality broken
- Auto-start toggle disabled but still visible
- Unexpected €420-500 charges during setup
- App logs out on every action
- Duplicate commands cause unexpected behavior
- Modal pages get stuck and freeze app
- Repeat scheduling function inaccurate
Requested features
12 requests- Apple Watch app support
- Dynamic Island integration
- Temperature reached notifications
- Ability to cancel/edit bookings
- Google Home/Alexa integration
Show 7 moreShow fewer
- Better visual feedback for on/off status
- In-app help documentation and instructions
- Language selection button always visible
- Advanced statistics and analytics
- User community map feature
- Persistent language preference storage
- Confirmation dialogs for critical actions
Penombra
Not enough reviews yet to summarise bugs or requests.
In-app purchases
HUUM
No in-app purchases
Penombra
No in-app purchases









