# e vs SolidTrackPro

The clearest difference is update cadence: SolidTrackPro at every 2 months against e's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e ships an update every 9 months, SolidTrackPro every 2 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | e | SolidTrackPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 28 MB | 42 MB |
| Requires iOS | **11.4** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tribal Education Ltd](https://appshunter.io/developer/393135394) | [BeltRoadIoT Technology Co., Ltd.](https://appshunter.io/developer/1647142446) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-track-assess/id962794366)

**Features:** macOS Compatibility

**In-app purchases:** none


### SolidTrackPro

[App page](https://appshunter.io/ios/app/solidtrackpro/id6444427472)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is SolidTrackPro free?

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

### Do e or SolidTrackPro have ads?

Neither e nor SolidTrackPro shows ads.

### Which is updated more often, e or SolidTrackPro?

e ships an update every 9 months, and SolidTrackPro every 2 months. Most recently, e was updated on October 14, 2026 and SolidTrackPro on October 19, 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.*