Atomic Letters vs Polyrhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Letters
Create unique visual representations of names and phrases using elements from the Periodic Table. Personalize your creations with custom fonts, colors, and backgrounds. The app generates high-quality PNG files perfect for various design projects.
- Spell names and phrases with Periodic Table elements
- Customize fonts, colors, and backgrounds
- Generate PNG files for various uses
- Unique name spellings
- Personalized design options
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This app uses elements of the Periodic Table to spell out your name, or just about any other phrase you’d like. First select your spelling (The name "Corey" can start out with Carbon and Oxygen, or the the simpler Cobalt). Then customize it by choosing fonts, colors, background images, and shading. The Atomic Letters app will generate a PNG file suitable for everything from email signatures to t-shirt designs. If your name is Bacon or Beer, there are already several places on the interwebs to find your name spelled out with items from the Periodic Table. This app is for the rest of us.
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
The clearest difference is review sentiment: Atomic Letters at 100% against Polyrhythm's 25%. Atomic Letters also leads on rating (5.0 vs 2.1) and in-app purchases (none vs 3). Polyrhythm's advantage is update cadence (every 5 weeks vs every 61 months) and ratings volume (9 vs 2). On price, ads, device support and iOS requirement 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. Polyrhythm sells 3 in-app purchases, starting at $1.99 per 7 days. Atomic Letters asks for nothing beyond the download.
Atomic Letters holds the better App Store score, 5.0 against 2.1. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews point the same way: 100% of Atomic Letters's written reviews are positive against 25% of Polyrhythm's.
Atomic Letters ships an update every 61 months, Polyrhythm every 5 weeks. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.
| Parameter | Atomic Letters | Polyrhythm |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 2.1 (9 ratings) |
| Positive reviews | 100.0% of reviews — better | 25.0% of reviews |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 61 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 9 MB | 131 MB |
| Age rating | 4+ | 4+ |
| Developer | Post River Software | Stanislav Duplinskiy |
Customer experience
Atomic Letters
Polyrhythm
In-app purchases
Atomic Letters
No in-app purchases
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
Questions
Is Atomic Letters free?
Is Polyrhythm free?
Which has better reviews, Atomic Letters or Polyrhythm?
Do Atomic Letters or Polyrhythm have ads?
Which is updated more often, Atomic Letters or Polyrhythm?
Other comparisons
