Comparison

Vault Data vs Watt CS

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

Head to head
About

Vault Data

Features
Read full description

Store your Passwords or Notes in iCloud. Your info will show up again on all devices with our app and your iCloud account.

About

Watt CS

Features
Read full description

Stop guessing. Start measuring. Watt CS shows your charger's true output in real time — down to 0.1W — using direct hardware sensor data via the Nitro Library. Plug in and instantly know if you're getting fast charging, or being shortchanged by a cheap cable. — REAL-TIME WATTAGE MONITOR — • Live watts updated continuously with 0.1W precision • Direct hardware sensor access via Nitro Library — not estimated • Dynamic charging ring changes color and icon for Fast or Full states • Professional hardware calibration ensures every reading is accurate — BENCHMARK YOUR CHARGERS — • Run scientific speed tests with custom start and end percentages • Test Apple 20W, Anker, MacBook charger, or any cable side by side • Charger Leaderboard automatically ranks every charger by real efficiency • Know exactly which charger is worth keeping and which to replace — SMART CHARGING HISTORY — • Every session logged automatically: Max Watts, Avg Speed, Total Time • One-tap filters: Fast, Normal, or Slow sessions in one tap • Spot patterns — does your charger slow down at night? History reveals it — UNDERSTAND YOUR BATTERY — • 80% Trickle Detection with visual warning and science-backed explanation • Know why charging intentionally slows after 80% to protect battery health • No more wondering if something is wrong — the app explains it clearly — PREMIUM & PRIVATE — • No ads. No accounts. No internet connection required. • All data stays entirely on your device • Glassmorphism UI, full Dark Mode, animated splash screen • Designed for iPhone and iPad PERFECT FOR: → Testing a new charger before trusting it overnight → Diagnosing why your iPhone charges slowly → Verifying your cable actually supports fast charging → Deciding which charger to pack for a trip Watt CS gives you the data. You make the decision.

Screenshots

Vault Data3 screens
Watt CS4 screens

Verdict

The call

The clearest difference is price: Vault Data at Free against Watt CS's $0.99. Watt CS's advantage is iOS requirement (16.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

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

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

Vault Data is free to download; Watt CS costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences Ā· 4 level
Vault Data versus Watt CS: the parameters behind the verdict, then further details
ParameterVault DataWatt CS
PriceFree — better$0.99
Update frequencyEvery 3 days—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.016.0 — better
Further details — not scored
Size3 MB37 MB
Age rating4+4+
DeveloperGiant Little Games, LLCAakash Sajjad

In-app purchases

None

Vault Data

No in-app purchases

None

Watt CS

No in-app purchases

Questions

Is Vault Data free?
Vault Data is free to download, with no in-app purchases.
Is Watt CS free?
Watt CS costs $0.99, with no in-app purchases.
Do Vault Data or Watt CS have ads?
Neither Vault Data nor Watt CS shows ads.

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