AudioWorks vs Calmika
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AudioWorks
Explore sound and music with interactive visualizations and synthesis tools. Analyze waveforms, create sounds with additive synthesis, and experiment with audio effects. Ideal for learning about acoustics and audio manipulation.
- Interactive sound visualizations
- Waveform and spectral analysis
- Additive synthesis mode
- Audio effects manipulation
- MIDI keyboard support
- Contextual help menu
Read full descriptionHide full description
AudioWorks is an interactive, educational tool for sound analysis and intuitive visual manipulation of sound effects. Developed for Drexel University's Summer Music Technology (SMT) program, AudioWorks gives users visual representations of sounds picked up by the iPad's internal microphone or line input. These visuals help users identify what makes different sounds and musical instruments unique in the shape of the waveform (time domain) and its spectral content (frequency domain). An additional synthesis mode allows users to approximate the frequency content and transient characteristics of real-world musical instruments by adjusting the amplitudes of individual sine waves (additive synthesis) plus noise, and by drawing amplitude envelopes directly on the plot. Users can also draw one period of an arbitrary waveform and examine its frequency content. The monophonic synthesizer is controllable using a frequency slider, on-screen keyboard, or external MIDI keyboard. Finally, an effects mode is used to illustrate how a few common sound effects (distortion, filtering, delay, and amplitude modulation) modify musical instrument signals, and what these changes look like in time and frequency. Each effect parameter is manipulated in an intuitive way that directly relates to how the effect works, and a contextual help menu guides the user in activating the effect and modifying its parameters. Effects can be applied to any signal coming in through the microphone or line input, or signals generated in synthesis mode. Using an external MIDI controller, effects parameters can be dynamically mapped to control changes and channel aftertouch messages.
Calmika
Read full descriptionHide full description
Calmika helps families support autistic and neurodivergent children with calm, visual everyday tools. The app combines AAC communication boards, visual routines, first-then support, calm-down activities, social stories, coloring, music, learning games, and parent guidance in one child-friendly environment. Calmika is completely free and ad-free. All features are available without a subscription or in-app purchase. Calmika is built for predictable, low-pressure use: soft visuals, simple navigation, parent-gated settings, and a design focused on everyday family routines rather than ads or overstimulating rewards. Calmika does not provide medical diagnosis, treatment, or therapy replacement. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://calmika.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: AudioWorks at none against Calmika's 3. AudioWorks also leads on iOS requirement (11.4 vs 13.0). Calmika's advantage is update cadence (every 3 weeks vs every 11 months) and device support (3 vs 1). On price and ads 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. Calmika sells 3 in-app purchases, starting at $3.99 per month. AudioWorks asks for nothing beyond the download.
AudioWorks ships an update every 11 months, Calmika every 3 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.
| Parameter | AudioWorks | Calmika |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 11 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 11.4 — better | 13.0 |
| Further details — not scored | ||
| Size | 4 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | SoundSpin | David Kovacs |
In-app purchases
AudioWorks
No in-app purchases
Calmika
- Calmika Pro Monthly$3.991 Month
- Calmika Pro Annual$39.991 Year
- Calmika Pro Lifetime$69.99









