# mySleepButton vs CalSpark

The clearest difference is update cadence: CalSpark at every 5 days against mySleepButton's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. mySleepButton sells 1 one-off in-app purchase and CalSpark sells 1 in-app purchase, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

mySleepButton ships an update every 5 months, CalSpark every 5 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | mySleepButton | CalSpark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (212 ratings)](https://appshunter.io/ios/app/mysleepbutton/id740251957/reviews)** | — |
| Number of ratings | **212** | — |
| Positive reviews | 72.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 61 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [CogSci Apps Corp.](https://appshunter.io/developer/740251960) | [Hung Tsan Yuen](https://appshunter.io/developer/6783718452) |

## What reviewers say

### mySleepButton

[App page](https://appshunter.io/ios/app/mysleepbutton/id740251957)

This app uses a "cognitive shuffle" technique to help users fall asleep by distracting their minds with imagery. It offers guided meditations and can be used with audio devices for a screen-free experience.

**Highlights:** Cognitive shuffle technique, Guided imagery for sleep, Affective body scan meditation, Configurable meditation pack, Audio playback on external devices, Siri shortcuts

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Give thanks & support our R&D | $9.99 | one-time |

**What reviewers like**

- 👍 No fuss, just works
- 👍 Effective for insomnia
- 👍 Puts me to sleep quickly
- 👍 Helps shut down racing thoughts
- 👍 Better than sleeping pills

**What reviewers complain about**

- 🐛 Audio quality issues (crackling, clicking)
- 🔧 Requires in-app purchases to unlock full functionality
- 🔧 Repetitive content in free version

**Reported bugs**

- App crashes after iOS updates
- Purchased content not restoring properly

**Requested features**

- More diverse content and voices
- Randomized word/scene order
- Support for additional languages
- Apple Watch app


### CalSpark

[App page](https://appshunter.io/ios/app/calspark-calorie-counter/id6783718450)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalSpark Premium | $24.99 | per year |


## Frequently asked questions

### Is mySleepButton free?

mySleepButton is free to download, with in-app purchases available.

### Is CalSpark free?

CalSpark is free to download, with in-app purchases available.

### Do mySleepButton or CalSpark have ads?

Neither mySleepButton nor CalSpark shows ads.

### Which is updated more often, mySleepButton or CalSpark?

mySleepButton ships an update every 5 months, and CalSpark every 5 days. Most recently, mySleepButton was updated on November 1, 2026 and CalSpark on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*