Comparison

Epistles Mail vs Convert Studio X

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

Head to head
About

Epistles Mail

Consolidate multiple email accounts into a single, unified inbox. Enjoy a native mobile experience with responsive gestures and offline functionality. Prioritizes user privacy with a zero-knowledge cloud vault for secure cross-device setup.

Highlights
  • Unified inbox for multiple providers
  • Native mobile experience
  • Offline functionality
  • Privacy-first design
  • Zero-knowledge cloud vault
  • Local-first sync
Read full description

Epistles is a fast, powerful email app for people who use more than one provider. Bring Fastmail, Gmail, Microsoft 365 / Outlook, ProtonMail, and generic IMAP accounts into one unified inbox, with the polish of a premium client and architecture built for real-world email. MULTIPLE ACCOUNTS, ONE EXPERIENCE See everything in one timeline or drill into a single account when you need focus. Switch providers without switching apps. NATIVE WHERE IT MATTERS Built as a real native mobile experience. Responsive gestures, solid offline behavior, and attention to the small details that make daily email less painful. PRIVACY-FIRST DESIGN Epistles is not an “AI that reads your threads” product. Your mail stays oriented around you and your providers, not server-side content mining for ads or training. ZERO-KNOWLEDGE CLOUD VAULT Cross-device setup backs up connection metadata with encryption designed so the relay can’t unwrap your secrets. LOCAL-FIRST SYNC Keep working when connectivity is spotty; sync when you’re back online. WHO IT’S FOR • Multi-account professionals juggling work and personal mail • Power users coming from Fastmail, Gmail, Outlook, or Proton who want one inbox • Anyone who wants a universal client without giving up control Epistles is independently developed with a simple goal: make excellent email software that respects how people actually use email today. Terms of Use: https://epistles.net/terms/

About

Convert Studio X

Features
Read full description

Convert images, PDFs, audio, and video on your iPhone and iPad. Convert Studio X identifies each file by its actual type and shows only conversions your device can perform. Everything is processed locally—no account and no cloud upload. Import from Photos or Files, adjust the settings you need, then save verified new files to Photos or Files or send them through the system share sheet. === Features === Image Conversion Batch-convert common image formats, with additional formats offered according to the actual capabilities of your device. Resize images, adjust quality, manage transparent backgrounds, and choose to keep all metadata, remove location information, or remove all metadata. PDF Tools Export PDF pages as PNG or JPEG, or combine images and PDFs into a new document in your chosen order. Reorder, rotate, remove, split, and extract pages. You can also create password-protected copies or unlock PDFs you are authorized to process. Audio Conversion Convert common audio formats including MP3, M4A, WAV, and FLAC. Adjust quality, sample rate, and channels when available. The app shows only output options that have been verified on your current device. Video Conversion and Audio Extraction Convert between MP4 and MOV, choose H.264 or HEVC, and select source, 4K, 1080p, 720p, or 480p resolution when applicable. Balance file size and quality with simple presets, and keep the audio or create a silent copy. You can also extract M4A, MP3, WAV, or FLAC audio from video and select a readable audio track when a single video contains more than one. Batch Processing by Category Add multiple files of the same category, apply shared settings, and convert them in order. Follow the progress of each item and the complete batch. A problem with one file does not discard results that have already completed successfully. Local Conversion History Successful results stay in the app's local conversion history until you delete them. Preview results at any time, save them again to Photos when applicable or to Files, share them through the system share sheet, or delete individual results, batches, or all history. Safe Results Convert Studio X never overwrites, modifies, or deletes your original files. Every result is created in the app's own temporary location and reopened for verification before it is made available to save or share. === Designed for iPhone and iPad === • Clear, focused navigation on iPhone for one workflow at a time. • An adaptive split layout on iPad with support for portrait, landscape, and multitasking. • Support for Dark Mode, Dynamic Type, VoiceOver, increased contrast, and Reduce Motion. • Switch the app instantly between System, English, or Simplified Chinese and choose System, Light, or Dark appearance. === Privacy === File conversion takes place entirely on your device. Convert Studio X requires no account, contains no advertising, uses no analytics or telemetry, and has no hidden upload path. The app accesses photos and files only after you choose content or save a result. Diagnostic information does not include file contents, file names, full file paths, passwords, or access credentials. === Platform === Requires iOS 18 or iPadOS 18 or later.

Screenshots

Epistles Mail4 screens
Convert Studio X2 screens

Verdict

The call

The clearest difference is in-app purchases: Convert Studio X at none against Epistles Mail's 2. Epistles Mail's advantage is iOS requirement (16.6 vs 18.0). On price, 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

Both are free to download. Epistles Mail sells 2 in-app purchases, starting at $49.99 per year. Convert Studio X asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Epistles Mail versus Convert Studio X: the parameters behind the verdict, then further details
ParameterEpistles MailConvert Studio X
PriceFreeFree
Rating4.4 (7 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings7 — better—
Update frequencyEvery 2 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS16.6 — better18.0
Further details — not scored
Size146 MB10 MB
Age rating4+4+
DeveloperNetwarden LLCChangsha Eedon Technology Co., Ltd

In-app purchases

2 purchases

Epistles Mail

Subscriptions1
  • Pro Annual$49.991 Year
One-time1
  • Bereans Edition$149.99
None

Convert Studio X

No in-app purchases

Questions

Is Epistles Mail free?
Epistles Mail is free to download, with in-app purchases available.
Is Convert Studio X free?
Convert Studio X is free to download, with no in-app purchases.
Do Epistles Mail or Convert Studio X have ads?
Neither Epistles Mail nor Convert Studio X shows ads.

Other comparisons