Digi vs Polyrhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Digi
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The sanctuary of Asclepius, or Asclepieion, stretches over a verdant plain with countless water sources among mountains and hills. The earliest indications of a cult development can be traced to the nearby Mount Kynortion, as early as the second millennium B.C. Initially, a specific tribe used to worship their ancestors there, and around 800 B.C., this evolved into a cult of Apollo. Malos, the founding king of the area, gave his name to the cult of Apollo Maleatas. The pilgrims in this sanctuary strived for health through cleansing and culinary rituals. Practical reasons soon saw the cult moving to the plain. Apollo’s son, Asclepius, became a major subject of worship, soon after he first appeared, in the 6th century B.C. Asclepius’ fame rose rapidly and many affiliated sanctuaries were established throughout Greece. The gathering of a large number of pilgrims saw a vertical increase of the sanctuary’s income. All this money is invested toward building the most important buildings of the sanctuary in the 4th century B.C. The period of significant prosperity lasted for about three centuries. However, raids by pirates and foreign tribes caused excessive damage to the buildings. Despite this, the Roman senator Antoninus funded a reconstruction, offering the sanctuary its last major heyday in the 2nd century AD. Three centuries later, the sanctuary is shut down and abandoned by order of the Byzantine emperor Theodosius to ban all ancient cults.
Polyrhythm
Create a personalized soundscape for relaxation, sleep, or meditation. Explore a variety of organic and synthesized instruments, ambient background sounds, and AI-generated presets. Customize and save your favorite sound combinations for a tranquil experience.
- Variety of sound presets
- Organic and synthesized instruments
- Background ambient sounds
- AI preset generator
- Advanced preset customization
- Create and save custom presets
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When it's time for rest and relaxation, our app will become your faithful companion. Perfect for use before sleep or during meditation, it can also help soothe your child or yourself. Based on polyrhythmic sound playback, our app promises a deep immersion into the world of sounds and visualizations. Features of our app: - A variety of presets with unique moods; - Various organic and synthesized musical instruments to create the perfect atmosphere; - Background sounds including white noise, bird songs, and ocean waves; - AI preset generator for a continuous flow of inspiration; - Advanced preset customization for precise sound tuning; - Ability to create custom presets and save them to favorites. Discover the world of harmony and tranquility with our unique app - your personal oasis of calm. Also worth reading Privacy Policy: https://sites.google.com/view/castles-trip-privacy-policy. And Terms of use: https://sites.google.com/view/polyrhythm-tos
Screenshots
Verdict
Digi and Polyrhythm are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Digi sells 1 one-off in-app purchase and Polyrhythm sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Digi ships an update every 2 months, Polyrhythm every 5 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | Digi | Polyrhythm |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.1 (9 ratings) — better |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 97 MB | 131 MB |
| Age rating | 4+ | 4+ |
| Developer | Moptil Ltd | Stanislav Duplinskiy |
In-app purchases
Digi
- Digi-Past Epidaurus Content$12.99
Polyrhythm
- Full access to app functions$1.997 Days
- Full access to app functions$5.991 Month
- Full access to app functions3 Days trial$12.993 Months









