# Theta Waves (Legacy) vs Hemi

The clearest difference is rating: Hemi at 4.4 against Theta Waves (Legacy)'s 3.6. Hemi also leads on update cadence (every 2 weeks vs every 67 months) and ratings volume (2.5K vs 14). Theta Waves (Legacy)'s advantage is monetization model (free with in-app purchases vs subscription) and review sentiment (58% vs 32%). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Theta Waves (Legacy) sells 1 one-off in-app purchase and Hemi sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

Hemi holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: Hemi has 2.5K ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 58% of Theta Waves (Legacy)'s written reviews are positive against 32% of Hemi's, so the app with the better star average is not the one people write more warmly about.

Theta Waves (Legacy) ships an update every 67 months, Hemi every 2 weeks. The most recent releases landed on August 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Theta Waves (Legacy) | Hemi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (14 ratings)](https://appshunter.io/ios/app/theta-waves-legacy/id971689987/reviews) | **[4.4 (2.5K ratings)](https://appshunter.io/ios/app/hemi-sync-flow/id1398928728/reviews)** |
| Number of ratings | 14 | **2.5K** |
| Positive reviews | **58.3% of reviews** | 31.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 67 months | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 19 MB | 94 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Equilibrium Srl](https://appshunter.io/developer/546309406) | [Interstate Industries, Inc.](https://appshunter.io/developer/514852942) |

## What reviewers say

### Theta Waves (Legacy)

[App page](https://appshunter.io/ios/app/theta-waves-legacy/id971689987)

This app generates binaural sounds to help users achieve deep meditation and mindfulness. It allows customization of sound frequencies, background music, nature sounds, and timers. Unlock full features by purchasing the premium version.

**Highlights:** Binaural sound generation, Adjustable frequency slider, 7 integrated songs, 5 nature sounds, Built-in meditation timer, Customizable background colors

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theta Waves Full Pack | $9.99 | one-time |


### Hemi

[App page](https://appshunter.io/ios/app/hemi-sync-flow/id1398928728)

Explore consciousness with a curated selection of audio tracks. Access over 300 titles, including guided exercises, and create custom soundscapes. Meditate, sleep, concentrate, or relax with this comprehensive audio experience.

**Highlights:** Curated audio library, Over 300 titles, Gateway Experience exercises, Custom track mixer, Free DailySync feature, Meditate, sleep, concentrate, relax

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $14.99 | per month |
| Annual Subscription | $89.99 | per year |

**What reviewers like**

- 🌟 Helpful for meditation and mental health
- 🔊 High-quality audio
- 💻 Broad selection of content
- 🕰️ Useful for daily routines

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🤔 Confusing navigation and organization
- 💰 Expensive subscription
- 📼 Limited access to full-length tracks
- 🔍 Lack of clear information about content

**Reported bugs**

- Audio playback issues and abrupt stops
- Login and account syncing problems
- Compatibility issues on certain devices
- Glitches in the app's core functionality

**Requested features**

- Offline listening capability
- Better progress tracking and personalization
- Improved search and filtering options
- More detailed track descriptions


## Frequently asked questions

### Is Theta Waves (Legacy) free?

Theta Waves (Legacy) is free to download, with in-app purchases available.

### Is Hemi free?

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

### Which has better reviews, Theta Waves (Legacy) or Hemi?

Hemi is rated higher. Theta Waves (Legacy) averages 3.6 out of 5 from 14 ratings, while Hemi averages 4.4 from 2.5K ratings.

### Do Theta Waves (Legacy) or Hemi have ads?

Neither Theta Waves (Legacy) nor Hemi shows ads.

### Which is updated more often, Theta Waves (Legacy) or Hemi?

Theta Waves (Legacy) ships an update every 67 months, and Hemi every 2 weeks. Most recently, Theta Waves (Legacy) was updated on August 23, 2026 and Hemi on September 25, 2026.

---

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