MusTerra vs VocalClock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MusTerra
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Our app allows you to measure tree diameter and height, capture their location, and visualize them on a map for tracking and analysis. Designed for foresters, researchers, and nature enthusiasts, it makes tree measurement and data management effortless. Features & Functionality: Measure Tree Diameter & Height – Use your phone’s camera for accurate measurements. Find & Store Location – Automatically record GPS coordinates of each tree. Visualize on Map – View and manage measured trees on an interactive map. Store & Organize Data – Save measurements with notes for future reference. Export Data – Easily share or export tree data for reports or research. Track and analyze trees with ease! Download now!
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
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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 iOS requirement: MusTerra at 16.0 against VocalClock's 18.6. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
MusTerra ships an update weekly, VocalClock every 10 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | MusTerra | VocalClock |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Weekly — better | Every 10 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 138 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | MUST GmbH | Khuyen Duong |
In-app purchases
MusTerra
No in-app purchases
VocalClock
No in-app purchases









