Comparison

HUUM vs Impromptu!

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Remote sauna heating
  • Scheduled heating times
  • Calendar bookings
  • Temperature notifications
  • Mobile control
Features
Read full description

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.

About

Impromptu!

Features
Read full description

Got a free hour? Impromptu tells you what to do with it. Open the app and instantly see real things happening within walking distance — restaurants open now, live events and shows, parks, cafés, and more — ranked by how close they are and how much time you've got. No endless scrolling. No planning. No mood quizzes. Just tell Impromptu how much time you have — 30 minutes, an hour, or the whole evening — and it shows you a handful of great options nearby, each with photos, ratings, walking time, and a tap-through to directions or tickets. WHY YOU'LL LIKE IT • Real, verifiable places and events — every suggestion links to Google Maps or Ticketmaster, so nothing is made up • Filtered by your time — see only what fits the window you actually have • Walking-distance first — everything's close enough to just go • A map view to see what's around you at a glance • Save the spots you want to come back to • Tap "Show me something else" for a fresh set anytime Impromptu is built for the spur of the moment — when you're out, a little bored, and want something good to do right now.

Screenshots

HUUM4 screens
Impromptu!3 screens

Verdict

The call

The clearest difference is update cadence: Impromptu! at every 4 days against HUUM's monthly. On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HUUM ships an update monthly, Impromptu! every 4 days. The most recent releases landed on November 1, 2026 and October 13, 2026 respectively.

Scorecard1 real difference · 9 level
HUUM versus Impromptu!: the parameters behind the verdict, then further details
ParameterHUUMImpromptu!
PriceFreeFree
Rating2.3 (30 ratings) — better—
Positive reviews10.6% of reviews—
Number of ratings30 — better—
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.0 — better
Further details — not scored
Size66 MB3 MB
Age rating17+17+
DeveloperHUUMISAAC ANTHONY SUTHERLAND

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 more
  • 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 more
  • 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

Impromptu!

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

HUUM

No in-app purchases

None

Impromptu!

No in-app purchases

Questions

Is HUUM free?
HUUM is free to download, with no in-app purchases.
Is Impromptu! free?
Impromptu! is free to download, with no in-app purchases.
Do HUUM or Impromptu! have ads?
Neither HUUM nor Impromptu! shows ads.
Which is updated more often, HUUM or Impromptu!?
HUUM ships an update monthly, and Impromptu! every 4 days. Most recently, HUUM was updated on November 1, 2026 and Impromptu! on October 13, 2026.

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