Comparison

KEMS vs Bubble Level

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

Head to head
About

KEMS

Features
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KEMS – Majte spotrebu energie pod kontrolou Aplikácia KEMS vám umožňuje jednoducho sledovať spotrebu elektrickej energie nameranú vašimi elektromermi. Získajte prehľad o svojej spotrebe v reálnom čase, kontrolujte historické údaje a získajte dôležité informácie o svojich elektromeroch – všetko na jednom mieste. Hlavné funkcie: - Prehľadná vizualizácia aktuálnej aj historickej spotreby - Detailné informácie o jednotlivých elektromeroch - Upozornenia o nameranej spotrebe - Jednoduché a intuitívne ovládanie KEMS je ideálnym nástrojom pre domácnosti, firmy aj správcov budov, ktorí chcú efektívne sledovať a optimalizovať svoju energetickú spotrebu. Zostaňte informovaní. Šetrite energiu. Používajte KEMS.

About

Bubble Level

Features
Read full description

A bubble level, plumb bob and angle finder in one app — hold your phone against a wall, post or shelf and read the exact tilt in degrees, percent grade or roof pitch. Most level apps stop at a bubble sliding in a tube. PlumbLine adds the tool the trades actually reach for: a digital plumb bob that swings to the side a wall leans and snaps green at true vertical, a two-axis surface check that tells you which edge sits low, and a calibration step that cancels out a slightly bent case so every later reading is honest. WHAT YOU GET - Know instantly whether a wall, post or door jamb is truly vertical, not just "close enough" - Level a shelf, picture frame or rail on the first try instead of nudging and re-checking - See if a worktop, tile or table is flat on both axes, and exactly which edge to shim - Read any slope three ways — degrees, percent grade, or rise-in-12 roof pitch — with no math - Freeze a reading with Hold, so you can lower the phone and still see the number - Keep a timestamped log of every check, so you can prove what was true when you left the job PERFECT FOR - DIYers hanging frames, shelves, mirrors and curtain rails - Carpenters, tilers and finish trades checking jambs, studs and worktops - Homeowners setting fence posts, gates and decking - Anyone who wants a straight result without carrying a spirit level around WHY NOT JUST USE A POCKET SPIRIT LEVEL? A physical level tells you the bubble is "about" centred. PlumbLine gives you the number — 0.4 degrees of lean, low on the right — plus a pass or fail badge against a tolerance you set yourself, and a saved record afterwards. It is already in your pocket, and it never gets left in the van. PRIVACY Everything runs on the motion sensor already in your device. No account, no ads, no tracking, no internet connection needed. Your readings and saved log stay on your phone. FULL ACCESS PlumbLine Premium unlocks the full toolkit — plumb bob, spirit level, surface check, the angle finder with percent and roof-pitch units, fine calibration, and the saved measurement log. Choose a weekly plan, a yearly plan, or a one-time lifetime purchase. Restore Purchases is always available in Settings. Open PlumbLine, press a long edge of your phone flat against the next wall you were about to eyeball, and see how far off it really is. Not for surveying, aviation or safety-critical alignment. Readings are approximate. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Contact tphuc.work@gmail.com

Screenshots

KEMS4 screens
Bubble Level4 screens

Verdict

The call

The clearest difference is in-app purchases: KEMS at none against Bubble Level's 3. KEMS also leads on iOS requirement (15.1 vs 17.0). Bubble Level's advantage is update cadence (monthly vs every 3 months). On price, ads 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. Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days. KEMS asks for nothing beyond the download.

UpkeepUpdate frequency

KEMS ships an update every 3 months, Bubble Level monthly. The most recent releases landed on September 19, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 3 level
KEMS versus Bubble Level: the parameters behind the verdict, then further details
ParameterKEMSBubble Level
PriceFreeFree
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size36 MB5 MB
Age rating4+4+
DeveloperKedros, a.s.Phuc Pham

In-app purchases

None

KEMS

No in-app purchases

3 purchases

Bubble Level

Subscriptions2
  • Bubble Gauge Weekly$4.997 Days
  • Slope Finder Yearly$24.991 Year
One-time1
  • Angle Meter, Pay Once$49.99

Questions

Is KEMS free?
KEMS is free to download, with no in-app purchases.
Is Bubble Level free?
Bubble Level is free to download, with in-app purchases available.
Do KEMS or Bubble Level have ads?
Neither KEMS nor Bubble Level shows ads.
Which is updated more often, KEMS or Bubble Level?
KEMS ships an update every 3 months, and Bubble Level monthly. Most recently, KEMS was updated on September 19, 2026 and Bubble Level on October 13, 2026.

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