Comparison

Si vs Deeck

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

Head to head
About

Si

Features
Read full description

Features 1. APP remote monitoring and management, Optional automatic/manual mode 2. APP fast switch light,light status monitoring 3. Scan QR code to share light to friends 4. Drive away the birds

About

Deeck

Features
Read full description

Know how long your battery will last, in days and hours. Deeck puts the power system of your camper, van, boat or off-grid home on one clear screen: battery, solar, engine charging, shore power and what you are using right now. Works with Victron Energy devices over Bluetooth: battery monitors, solar chargers, chargers and inverters show up on their own. WHAT YOU GET β€’ Dashboard: battery charge, voltage, current and where the power is flowing, live. β€’ Energy balance and autonomy: what you produce against what you use, and the time left in days and hours, counted down to the reserve you choose. β€’ Solar forecast (Plus): days ahead, so you know whether the weather keeps you above your reserve. β€’ History: battery and energy over the last day, week or month. β€’ Alarms and notifications: low battery, voltage and temperature. With Deeck Bridge, a small companion that stays on board, alerts reach you even when the app is closed (Plus). β€’ Apple Watch (Plus): battery and autonomy on your wrist, also as a watch-face complication. β€’ Widgets: battery, autonomy and the weekly balance on your Home Screen. β€’ CarPlay (Plus): your battery on the car display while you drive. β€’ Siri: ask for the battery, the autonomy, the solar production or a full summary. β€’ Remote with VRM (Plus): connect your VRM account and see your system from anywhere. β€’ Backup: move to a new iPhone in one step, with automatic iCloud backup (Plus). β€’ Demo: try every screen with a simulated system, no hardware needed. DEECK PLUS Deeck is free to download and shows your system live over Bluetooth. Deeck Plus, a yearly subscription, unlocks everything: solar forecast days ahead, your system and its alerts from anywhere, advanced multi-threshold alarms, extended history and export, CarPlay, Apple Watch, dashboard mode lock and iCloud backup. Payment is charged to your Apple ID. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period; you can manage or cancel it anytime in your Apple ID settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://deeck.app/privacy/ Deeck is an independent app, not affiliated with or endorsed by Victron Energy B.V. Victron Energy is a trademark of its owner.

Screenshots

Si3 screens
Deeck4 screens

Verdict

The call

The clearest difference is in-app purchases: Si at none against Deeck's 1. Si also leads on iOS requirement (9.1 vs 15.0). Deeck's advantage is update cadence (every 4 days vs every 5 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Deeck sells 1 in-app purchase, starting at $34.99 per year. Si asks for nothing beyond the download.

UpkeepUpdate frequency

Si ships an update every 5 months, Deeck every 4 days. The most recent releases landed on November 11, 2026 and November 13, 2026 respectively.

Scorecard3 real differences Β· 3 level
Si versus Deeck: the parameters behind the verdict, then further details
ParameterSiDeeck
PriceFreeFree
Update frequencyEvery 5 monthsEvery 4 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPod, Apple Watch β€” better
Requires iOS9.1 β€” better15.0
Further details β€” not scored
Size12 MB44 MB
Age rating4+4+
Developerζ—­ζ—₯δΈœζ–ΉDavide Di Benedetto

In-app purchases

None

Si

No in-app purchases

1 purchases

Deeck

Subscriptions1
  • Deeck Plus7 Days trial$34.991 Year

Questions

Is Si free?
Si is free to download, with no in-app purchases.
Is Deeck free?
Deeck is free to download, with in-app purchases available.
Do Si or Deeck have ads?
Neither Si nor Deeck shows ads.
Which is updated more often, Si or Deeck?
Si ships an update every 5 months, and Deeck every 4 days. Most recently, Si was updated on November 11, 2026 and Deeck on November 13, 2026.

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