# SynchroMix vs EF

The clearest difference is in-app purchases: SynchroMix at none against EF's 8. SynchroMix also leads on iOS requirement (12.4 vs 15.0). EF's advantage is update cadence (every 3 days vs every 8 days). On price, ads and device support there is nothing between them.

Both are free to download. EF sells 8 in-app purchases, starting at $1.99 per month. SynchroMix asks for nothing beyond the download.

SynchroMix ships an update every 8 days, EF every 3 days. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SynchroMix | EF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Size | 4 MB | 199 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [SURGICEN SL](https://appshunter.io/developer/1511469374) | [Kenneth Guber, M.D. LLC](https://appshunter.io/developer/1860110576) |

## What reviewers say

### SynchroMix

[App page](https://appshunter.io/ios/app/synchromix/id1511469375)

**Features:** macOS Compatibility

**In-app purchases:** none


### EF

[App page](https://appshunter.io/ios/app/ef-ortless-echo-trainer/id6758357075)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo+ Monthly | $1.99 | per month |
| Echo Pro Monthly | $2.99 | per month |
| Intern's Stash | $0.99 | one-time |
| Exam Cram Pass | $0.99 | one-time |
| Ischemia Detector | $0.99 | one-time |
| Right Heart Warrior | $0.99 | one-time |
| Fellow's Wallet | $2.99 | one-time |
| Attending's Vault | $9.99 | one-time |


## Frequently asked questions

### Is SynchroMix free?

SynchroMix is free to download, with no in-app purchases.

### Is EF free?

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

### Do SynchroMix or EF have ads?

Neither SynchroMix nor EF shows ads.

### Which is updated more often, SynchroMix or EF?

SynchroMix ships an update every 8 days, and EF every 3 days. Most recently, SynchroMix was updated on October 10, 2026 and EF on October 1, 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.*