Rubber Clock vs Bathyal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rubber Clock
Design a personalized digital clock by inputting text or uploading an image. Create unique time displays, from pet-themed clocks to countdown timers for important events.
- Create custom digital clocks
- Use text input for designs
- Upload photos for clock faces
- Design pet-themed clocks
- Set countdown timers
- Create bedside clocks
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Initial release of Rubber Clock. Create your own digital clock by typing a sentence or uploading a favorite photo. Make a cozy pet clock, a countdown for a special day, or a relaxing bedside clock. Turn time into something that feels like yours.
Bathyal
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Bathyal is a clepsydra — an ancient water clock — rebuilt for the deep sea. In the bathyal zone there is no day or night. No sunrise, no shadow, nothing to set a clock by. The only light is made by living things. Bathyal is the instrument that keeps time down there: a face of glowing concentric channels where every drop is a second, and time is material. Watch it work: • Each second forms as a drop at the heartbeat and joins the ring • A full ring of seconds distills into one minute — and pours, visibly, down into the next channel • Minutes pour into hours, hours into the day's two halves, days into months — at midnight the whole cascade runs at once • Once a year, the last drop of December sinks past the digits into the abyss, unmeasured Make it yours: • Solid bands or beaded drops, sweeping or pulsing motion • 24-hour or 12-hour time — 12-hour splits the hours at the meridian into a morning ring and an afternoon ring • Calendar rings for the month and year, or a Monday-first week ring whose weeks are spent, not kept • Run the midnight cascade demo any time from the settings On your wrist: • A full-screen water clock for Apple Watch — seconds, minutes, and hours in the same adjacent channels • Add Bathyal as a complication; the live rings sit on any face and rewrite themselves as the day moves. No two times look the same — that is the instrument, not a hand on a circle • Hold the Watch face for settings. Pulse or sweep, 12- or 24-hour time, and an optional Monday-first weekday ring. Hours, motion, and the week calendar also travel from the gear on iPhone On the Lock Screen: • Add Bathyal as a Lock Screen widget — live rings, a different pattern for every minute, the same figure as the Watch complication • Hours, motion, and the weekday ring follow from the gear Quiet by design: • Completely free, no accounts, no ads, no tracking — it never connects to anything • Works fully offline • Keeps the screen awake on a desk or bedside table If the instrument keeps good time for you, you can send a drop — a small tip — and the face answers with the benefactor tinctures: other colors of bioluminescence, and a single grain of sand set on the seabed of the dial. Drops become months.
Screenshots
Verdict
The clearest difference is device support: Bathyal at 4 against Rubber Clock's 1. Bathyal also leads on iOS requirement (16.0 vs 18.4). 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. Rubber Clock sells 3 one-off in-app purchases and Bathyal sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Rubber Clock ships an update every 5 days, Bathyal every 10 days. Both last shipped on November 5, 2026.
| Parameter | Rubber Clock | Bathyal |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 18.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 111 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 传河 张 | Stephen Zinn |
In-app purchases
Rubber Clock
- Small Eraser Pack$0.99
- Medium Eraser Pack$1.99
- Large Eraser Pack$2.99
Bathyal
- Tip Small$1.99
- Drop: The Benefactor's Drop$2.99
- Large: A Current$9.99









