Comparison

WattGuru vs VocalClock

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

Head to head
About

WattGuru

Features
Read full description

WattGuru turns your iPhone, iPad and Mac into a practical toolbox for electricity and energy. Calculate values, document meter readings and save calculation cases clearly – without a WattGuru account, advertising or tracking. ELECTRICAL TOOLS - Ohm's law from any two known values - Power and current for DC, single-phase AC and three-phase AC - Cable cross-section, voltage drop and maximum cable length - Energy, runtime, battery charging and consumption costs - Series and parallel resistor networks plus voltage dividers - Conversion of electrical units METERS AND COSTS Record household, sub, appliance, generation and storage meters. Log standard and off-peak readings, follow consumption and costs in charts, and exchange your own data using CSV when needed. PROJECTS AND REFERENCE Save calculator results together with inputs and assumptions in projects. The built-in reference explains voltage, current, power, energy, cables, protective measures and safe measurement in clear language. PRIVATE AND AVAILABLE ACROSS DEVICES Your data stays on your device by default. Optional iCloud sync keeps meters, tariffs and projects in step across your own Apple devices. cgNetsphere does not receive this content. WattGuru includes no advertising, tracking or analytics services. WattGuru is a calculation, planning and documentation aid. Work on electrical installations must be carried out by qualified people. Applicable standards, protective measures and manufacturer instructions always take precedence.

About

VocalClock

This app announces the time aloud at custom intervals, even when your screen is locked. It helps you stay focused by providing passive time awareness without interrupting your current task or app.

Highlights
  • Announces time at custom intervals
  • Runs in the background with screen locked
  • Adjustable announcement frequency
  • Customizable phrases before time announcement
  • Smart scheduling for specific days/times
  • Natural-sounding Siri voices
Features
Read full description

Stop checking your phone just to see the time. VocalClock announces the time aloud at any interval you choose, and keeps working even when your screen is locked. Stay focused, stay present, and let time come to you. STAY IN FLOW Lock your phone. Play music. Switch apps. VocalClock runs in the background and speaks the time without interrupting what you're doing. No more breaking concentration just to glance at the clock. ANY INTERVAL YOU NEED Set announcements from seconds to hours: • Every 30 seconds for precision timing • Every 5 minutes during workouts • Every hour while working • Any custom interval that fits your routine SPEAK IT YOUR WAY • Add a custom phrase before the time • Hear just the time if you prefer • Enable seconds for exact precision • Choose from natural-sounding Siri voices SMART SCHEDULING You don’t need announcements all day. VocalClock speaks only when you want it to: • Choose specific days of the week • Set active start and end times • Delay the start for future sessions DESIGNED FOR • Workouts and interval training • Cooking and task timing • Deep work and productivity • Meditation and mindfulness • Presentations and speaking practice • Anyone who wants passive awareness of time Simple. Reliable. Built to just work. Questions? Email us at: vocalclock.app@gmail.com

Screenshots

WattGuru4 screens
VocalClock4 screens

Verdict

The call

The clearest difference is in-app purchases: VocalClock at none against WattGuru's 1. On price, update cadence, 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. WattGuru sells 1 one-off in-app purchase. VocalClock asks for nothing beyond the download.

UpkeepUpdate frequency

WattGuru ships an update fortnightly, VocalClock every 10 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
WattGuru versus VocalClock: the parameters behind the verdict, then further details
ParameterWattGuruVocalClock
PriceFreeFree
Rating—4.8 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyFortnightlyEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.6 — better18.6
Further details — not scored
Size9 MB5 MB
Age rating4+4+
DeveloperMichael CaklecKhuyen Duong

In-app purchases

1 purchases

WattGuru

One-time1
  • WattGuru Full Version$3.99
None

VocalClock

No in-app purchases

Questions

Is WattGuru free?
WattGuru is free to download, with in-app purchases available.
Is VocalClock free?
VocalClock is free to download, with no in-app purchases.
Do WattGuru or VocalClock have ads?
Neither WattGuru nor VocalClock shows ads.
Which is updated more often, WattGuru or VocalClock?
WattGuru ships an update fortnightly, and VocalClock every 10 days. Most recently, WattGuru was updated on November 4, 2026 and VocalClock on November 5, 2026.

Other comparisons