Ask Euterpe vs The Untempered Cosmos
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ask Euterpe
This app provides randomized musical prompts and suggestions for composers, producers, and songwriters. It offers audio playback of generated ideas and allows users to save and refine their inspirations. The tool is designed to be a quick, privacy-focused creative companion for musicians of all levels.
- Randomized musical prompts
- Filterable output (scale, genre, instrumentation)
- Audio playback of scales and keys
- Save and refine "Visions"
- Instrument-agnostic suggestions
- Privacy-first architecture
Read full descriptionHide full description
A digital muse in your pocket. Inspired by the ancient Muse of Music, Ask Euterpe is a high-performance creative companion for the modern musician that generates randomized prompts for the user. Whether you are a film composer searching for inspiration, a producer looking for a unique melodic idea, or a songwriter exploring new harmonic territory, Euterpe provides the spark you need exactly when you need it. This app is instrument-agnostic. Whether you play piano, guitar, or work entirely with the blank page, Euterpe’s theory-grounded suggestions translate seamlessly to your workflow. Key Features The Muse’s Spark: Select filters to determine Euterpe's output. You can ask Euterpe to provide the scale, the instrumentation, suggest a genre, or even abstract directions that can help you break out of a rut. All information is stored on your device, and no AI is used to generate the outcomes - it's all in your hand. Audio Playback: Don't just read the music—hear it. Integrated playback for all generated scales and keys helps you feel the mood before you even pick up your instrument. Vision Management: Save your favorite generated inspirations as "Visions." Refine and edit them as your project grows from a simple idea into a full composition. Give your vision a title and add lyrics or notes; Euterpe will remember it all, and you can search through your library to find a specific vision. Built for Everyone: Tailored for composers, producers, and students alike - musicians of all levels. It’s a "no-nonsense" tool that eliminates the tedium of searching for inspiration, letting you focus on the craft of music. Why Ask Euterpe? As a musician, you know that inspiration is fleeting. Ask Euterpe was built to be a fast, lightweight, and professional-grade tool that doesn't require opening a heavy DAW or flipping through theory books. It’s the perfect companion for the studio, the practice room, or the tour bus. Privacy & Data Transparency Your creativity is your own business. Ask Euterpe is designed with a privacy-first architecture. No Personal Data Collection: We do not collect, store, or transmit your names, emails, or "Visions." Your creative work stays local to your device. No Tracking: Outside of standard, non-identifying ad-serving metrics, we do not track your behavior across other apps or websites.
The Untempered Cosmos
Experience a unique auditory representation of the night sky. This app translates celestial bodies into a dynamic, ever-changing soundscape based on their real-time positions and brightness. It offers an immersive, non-repeating musical experience tuned to a specific harmonic system.
- Real-time celestial positioning
- Spatialized 3D audio
- Dynamic, non-repeating soundscape
- Just intonation tuning
- Head tracking support (iOS 18+)
- Catalog of 88 celestial objects
Read full descriptionHide full description
The Untempered Cosmos is not a song. It is closer to a wind chime, or a fountain, or a room with a good view. You put it on and let it run, and over time you start to hear what it is doing. Preview it now at theuntemperedcosmos.com. The app turns the piece into a room you can stand inside: each star anchored to its real position overhead, the chord holding still as you turn. When you open it, the app reads your location, looks up which stars and planets are above your horizon at that moment, and assigns each one a sustained sine tone. The brighter the object, the louder. The higher in the sky, the more present. Each tone is placed in the space around you to match where its object is in the sky. As the Earth turns, stars rise and set, and the chord changes with them. There is no playback in the usual sense. Nothing is recorded, nothing repeats. Two people listening at the same instant from different cities will hear something different. The same listener returning at midnight will hear something different from what they heard at dusk. The piece is tuned to a single low D, with every audible tone a whole-number ratio above it. This is just intonation, the tuning choirs drift toward when no piano is forcing them to compromise. Sine tones have no harmonics of their own, so the only thing creating consonance between two of them is how cleanly their frequencies divide into each other. Eighty-eight objects: the Sun, the Moon, the five naked-eye planets, and eighty-one named stars down to magnitude 2.5. Each constellation is treated as a chord and tuned with intent. Some carry shimmer pairs, two stars detuned by fractions of a hertz so they beat slowly against each other. Best on headphones. The spatial design places each tone in three dimensions. On supported AirPods with iOS 18+, head tracking holds the chord locked to the world around you, so the stars stay where they are as you turn. Surround comes with the app. If you have a surround sound system, the app gives you a code that unlocks a version of the piece for a room of speakers on the website, played from the computer connected to your receiver. Every star comes from the speakers it sits between, and the sky turns around the room instead of around your head. By R. Andrew Lee. A work in progress; the catalog will keep growing.
Screenshots
Verdict
The clearest difference is price: Ask Euterpe at Free against The Untempered Cosmos's $3.99. The Untempered Cosmos's advantage is in-app purchases (none vs 1) and ads (none vs shown). On rating, review sentiment, ratings volume and update cadence 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
Ask Euterpe is free to download; The Untempered Cosmos costs $3.99 up front. Ask Euterpe sells 1 one-off in-app purchase. The Untempered Cosmos asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Ask Euterpe against 5.0 for The Untempered Cosmos. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Ask Euterpe ships an update every 8 days, The Untempered Cosmos weekly. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.
| Parameter | Ask Euterpe | The Untempered Cosmos |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 5.0 (4 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 — better | 3 |
| Update frequency | Every 8 days | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 98 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | JOSHUA ALEXANDER LILLY | RICHARD ANDREW LEE |
Customer experience
Ask Euterpe
The Untempered Cosmos
In-app purchases
Ask Euterpe
- Ads Removed Forever!$1.99
The Untempered Cosmos
No in-app purchases
Questions
Is Ask Euterpe free?
Is The Untempered Cosmos free?
Which has better reviews, Ask Euterpe or The Untempered Cosmos?
Do Ask Euterpe or The Untempered Cosmos have ads?
Which is updated more often, Ask Euterpe or The Untempered Cosmos?
Other comparisons















