Comparison

USB Mobile Disk vs ChargeFlow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

USB Mobile Disk

This app turns your iPhone or iPad into a portable storage device, allowing you to carry documents, music, and videos. It features a built-in file manager, music player, PDF reader, and supports various file transfer methods.

Highlights
  • Portable storage for iPhone/iPad
  • Advanced file manager
  • Background music player
  • PDF reader
  • Gallery import/export
  • FTP and HTTP file access
  • ZIP file creation/extraction
Features
Read full description

Carry all your documents, music, videos and any other data always with you. Store all your precious information in one secure place! This app transforms your iPhone & iPad to an advanced USB stick, full featured music player and even more: ▶ Use your iPhone and iPad as portable storage ▶ Advanced built-in file manager (rename, copy & paste, add folder, ...) ▶ Advanced background capable music player ▶ Advanced PDF reader ▶ Gallery import (photo and video) ▶ Gallery export (photo and video) ▶ Transfer downloaded files to your computer with iTunes ▶ Full FTP access to your files ▶ Full HTTP access to your downloads with your browser ▶ Send files by e-mail ▶ Receive files from other apps (e.g. e-mail attachments) ▶ Open files with other apps (e.g. Dropbox) ▶ Watch movies offline and listen to your music ▶ Preview and read documents (PDF Viewer) ▶ Create and extract ZIP-files ▶ Print documents using AirPrint ▶ Universal iPad / iPhone app ▶ HD / Retina support ▶▶▶ Have your USB stick always with you! The following file types are compatible with the built-in viewer. MOVIE FORMATS: Apple QuickTime (.mov), MPEG-4 (.mp4), m4v, 3GPP (.3gp) AUDIO FORMATS: MPEG-4 Advanced Audio Coding (.aac), Apple Lossless (.m4a) MPEG-1 audio layer 3 (.mp3), Waveform (.wav) DOCUMENT FORMATS: Excel (.xls), Keynote (.key.zip), Keynote '09 (.key), Numbers (.numbers.zip), Numbers '09 (.numbers), Pages (.pages.zip), Pages '09 (.pages), PDF (.pdf), Powerpoint (.ppt), Word (.doc), Rich Text Format (.rtf), Rich Text Format Directory (.rtfd.zip), Text (.txt), HTML (.htm/.html) IMAGE FORMATS: JPEG (.jpg/jpeg), Portable Network Graphics (.png), Graphics Interchange Format (.gif)

About

ChargeFlow

Features
Read full description

**How long? How much?** ChargeFlow is the fastest EV charging calculator. Estimate the time and cost of a charging session in two taps, with accurate results based on your vehicle's actual charging curve. **What you can do** • Pick your car from the built-in catalog (Tesla, Hyundai, Kia, Volkswagen, Audi, BMW, Renault, Peugeot, Fiat and more), or create a custom profile with your own curve. • Set start and target SoC with a slider. • Choose charger power, € / kWh rate, any session fees. • See time, cost, energy added, average and peak power. **Advanced features** • Power vs. SoC chart and cumulative energy curve • Live comparison between two different chargers • Save scenarios, mark favorites, share with one tap • Home screen widget (3 sizes) to always see your last estimate • Apple Watch companion app synced with the iPhone • Live Activity on iPhone Dynamic Island during an active charge **Privacy-first** ChargeFlow works fully offline. Your vehicles, scenarios and preferences stay on your device. No account, no registration, no personal data sent anywhere. **Transparent monetization** Non-intrusive banner ads on a few screens (no interstitials). Buy "Remove Ads" once for €2.99 and they're gone. Download it and find out what you're about to spend — before you plug in.

Screenshots

USB Mobile Disk4 screens
ChargeFlow4 screens

Verdict

The call

The clearest difference is price: ChargeFlow at Free against USB Mobile Disk's $0.99. USB Mobile Disk's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 16.0). On update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ChargeFlow is free to download; USB Mobile Disk costs $0.99 up front. ChargeFlow sells 1 one-off in-app purchase. USB Mobile Disk asks for nothing beyond the download.

UpkeepUpdate frequency

USB Mobile Disk ships an update every 3 months, ChargeFlow every 2 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
USB Mobile Disk versus ChargeFlow: the parameters behind the verdict, then further details
ParameterUSB Mobile DiskChargeFlow
Price$0.99Free — better
Rating4.3 (10 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings10 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size28 MB33 MB
Age rating4+17+
DeveloperRaphael OdermattNurale Srls

In-app purchases

None

USB Mobile Disk

No in-app purchases

1 purchases

ChargeFlow

One-time1
  • Remove Ads$3.99

Questions

Is USB Mobile Disk free?
USB Mobile Disk costs $0.99, with no in-app purchases.
Is ChargeFlow free?
ChargeFlow is free to download, with in-app purchases available.
Do USB Mobile Disk or ChargeFlow have ads?
Both USB Mobile Disk and ChargeFlow show ads.
Which is updated more often, USB Mobile Disk or ChargeFlow?
USB Mobile Disk ships an update every 3 months, and ChargeFlow every 2 months. Most recently, USB Mobile Disk was updated on October 6, 2026 and ChargeFlow on October 7, 2026.

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