WattGuru vs VocalClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WattGuru
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
Both are free to download. WattGuru sells 1 one-off in-app purchase. VocalClock asks for nothing beyond the download.
WattGuru ships an update fortnightly, VocalClock every 10 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | WattGuru | VocalClock |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Fortnightly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 9 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Caklec | Khuyen Duong |
In-app purchases
WattGuru
- WattGuru Full Version$3.99
VocalClock
No in-app purchases









