# SoloID Authenticator vs Mileage Book Fleet

SoloID Authenticator and Mileage Book Fleet are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

SoloID Authenticator ships an update every 2 months, Mileage Book Fleet every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | SoloID Authenticator | Mileage Book Fleet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 11 MB | 127 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Signaturgruppen A/S](https://appshunter.io/developer/1237104949) | [Appz Studio](https://appshunter.io/developer/519466600) |

## What reviewers say

### SoloID Authenticator

[App page](https://appshunter.io/ios/app/soloid-authenticator/id1668793320)

**Features:** Vision Pro support

**In-app purchases:** none


### Mileage Book Fleet

[App page](https://appshunter.io/ios/app/mileage-book-fleet/id6443627572)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SoloID Authenticator free?

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

### Is Mileage Book Fleet free?

Mileage Book Fleet is free to download, with no in-app purchases.

### Do SoloID Authenticator or Mileage Book Fleet have ads?

Neither SoloID Authenticator nor Mileage Book Fleet shows ads.

### Which is updated more often, SoloID Authenticator or Mileage Book Fleet?

SoloID Authenticator ships an update every 2 months, and Mileage Book Fleet every 6 weeks. Most recently, SoloID Authenticator was updated on October 24, 2026 and Mileage Book Fleet on October 24, 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.*