Comparison

SeltronHome Kelvin vs Sparkify Documentation

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

Head to head
About

SeltronHome Kelvin

Features
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Smart Heating. Smart Work. The Kelvin app is part of the SeltronHome solutions for smart and modern heating. The core component of SeltronHome is the GWD communication module, which connects the Seltron controller to the internet. Together with GWD, the Kelvin app enables you, as a service technician, to provide support to clients anytime, anywhere. With all clients in one place, you have an overview of their system's operation. This way, you can remotely diagnose client issues and better prepare for service visits. Less time on the road, more time for the client. Kelvin provides: an overview of all clients; an overview of all client buildings and devices; monitoring of temperature sensors and relays; graphical review of sensor and relay measurements for diagnostics; scheduling settings, temperature adjustments, and user functions like Party, Eco, and Holiday; notifications and alerts from the heating system controller.

About

Sparkify Documentation

Features
Read full description

Sparkify is documentation built for electricians. Create clean, consistent PDF reports on site — without paperwork. Made for: - VDE 0100-600 - VDE 0701/0702 - DGUV A3 - Photo documentation & defect documentation Fast data capture (no typing): - Wiha MFT & Wiha PAT via NFC - PAT image recognition for faster identification - Optional device integrations (e.g. Sola via Bluetooth) Field-ready by design: - 100% offline capable — work anywhere, sync laterGuest mode for quick testing without registration - Privacy-first architecture, hosted in Germany & France If you want structured documentation that matches how electricians work, Sparkify is the platform. Terms of Services: https://sparkify-app.com/app-tos/ Privacy Policy: https://sparkify-app.com/app-gdpr/

Screenshots

SeltronHome Kelvin4 screens
Sparkify Documentation4 screens

Verdict

The call

The clearest difference is in-app purchases: SeltronHome Kelvin at none against Sparkify Documentation's 2. SeltronHome Kelvin also leads on iOS requirement (15.0 vs 18.0). Sparkify Documentation's advantage is update cadence (weekly vs every 2 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. Sparkify Documentation sells 2 in-app purchases, starting at $19.99 per month. SeltronHome Kelvin asks for nothing beyond the download.

UpkeepUpdate frequency

SeltronHome Kelvin ships an update every 2 months, Sparkify Documentation weekly. Both last shipped on October 24, 2026.

Scorecard3 real differences · 3 level
SeltronHome Kelvin versus Sparkify Documentation: the parameters behind the verdict, then further details
ParameterSeltronHome KelvinSparkify Documentation
PriceFreeFree
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size196 MB149 MB
Age rating4+4+
DeveloperSELTRON d.o.o.Onstruc UG (haftungsbeschraenkt)

In-app purchases

None

SeltronHome Kelvin

No in-app purchases

2 purchases

Sparkify Documentation

Subscriptions2
  • Persönliche Cloud14 Days trial$19.991 Month
  • Persönliche Cloud+1 Month trial$49.991 Month

Questions

Is SeltronHome Kelvin free?
SeltronHome Kelvin is free to download, with no in-app purchases.
Is Sparkify Documentation free?
Sparkify Documentation is free to download, with in-app purchases available.
Do SeltronHome Kelvin or Sparkify Documentation have ads?
Neither SeltronHome Kelvin nor Sparkify Documentation shows ads.
Which is updated more often, SeltronHome Kelvin or Sparkify Documentation?
SeltronHome Kelvin ships an update every 2 months, and Sparkify Documentation weekly. Most recently, SeltronHome Kelvin was updated on October 24, 2026 and Sparkify Documentation on October 24, 2026.

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