# E vs SleepWarning

The clearest difference is in-app purchases: E at none against SleepWarning's 1. E also leads on iOS requirement (15.0 vs 17.6). SleepWarning's advantage is update cadence (every 4 days vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. SleepWarning sells 1 one-off in-app purchase. E asks for nothing beyond the download.

E ships an update every 8 months, SleepWarning every 4 days. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | E | SleepWarning |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/e-14-20/id6469003886/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 14 MB | 7 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Rohloff AG](https://appshunter.io/developer/1711238879) | [Tilo Greiner](https://appshunter.io/developer/1740838965) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-14-20/id6469003886)

Control your e-bike's electronic shifting system with this app. It synchronizes drive and shifting for fast, efficient gear changes, offering features like auto-downshift and multi-shift. Customize settings and access service functions for your e-bike.

**Highlights:** eShift with Bosch Smart System, Synchronized drive and shifting, Auto-Downshift customization, Invertable shifting direction, Multishift control, Service functions (calibration, diagnostics, updates)

**Features:** macOS Compatibility

**In-app purchases:** none


### SleepWarning

[App page](https://appshunter.io/ios/app/sleepwarning/id6758070039)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepWarning | $1.99 | one-time |


## Frequently asked questions

### Is E free?

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

### Is SleepWarning free?

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

### Do E or SleepWarning have ads?

Neither E nor SleepWarning shows ads.

### Which is updated more often, E or SleepWarning?

E ships an update every 8 months, and SleepWarning every 4 days. Most recently, E was updated on October 12, 2026 and SleepWarning on October 4, 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.*