Comparison

EML Viewer vs custodo

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

Head to head
About

EML Viewer

Easily view saved emails in EML format directly on your iOS device. Open attachments, share them with other applications, or print them. You can also compose a new email using the content of an EML file.

Highlights
  • View EML files
  • Access attachments
  • Share attachments
  • Print attachments
  • Compose new emails from EML
Features
Read full description

View .EML files on your iOS device, including attachments within them. These are usually emails saved in the EML format. Tap on an EML file in another app, "Open In..." and select EML Viewer to view your saved email. You may tap "open a sample EML" to see an example email open up. Attachments may be shared with other apps or printed. Tap the compose icon to open your EML as a new Mail message This app is for .EML files. If you also need to view Outlook .MSG files, check out our related apps MSG View and Message Viewer Pro on the App Store.

About

custodo

Features
Read full description

custodo brings your company’s documents, tasks, workflows and customers into one app. AI reads the documents; you have the final say. FROM YOUR PHONE • Documents — scan or upload a document. custodo recognises its type, extracts its data and files it in the right place. Find it again with search, previews, extracted fields and text. • Tasks — company-wide deadlines, priorities and overdue work in one list. • Workflows — approve or reject requests wherever you are, with deadlines and notifications on your phone. • Time tracking — clock in, take breaks and clock out with a tap. See the day’s times and hours worked. • Expenses — photograph a receipt. custodo reads the date, supplier and amount; you confirm the expense, including trips and mileage. • Plus Email and PEC, E-signatures, CRM, Contacts, Calendar, Checklists, Case registers and the other modules enabled for your company. PRACTICAL AI Summaries and extracted data are proposals for you to verify. Uncertain fields are marked for review, and each extracted value includes a confidence indication. SECURITY Fingerprint or face unlock, with the same role permissions your company uses on the web. Use custodo with your company account. Need one? Request a demo at custodo.ai.

Screenshots

EML Viewer2 screens
custodo4 screens

Verdict

The call

The clearest difference is price: custodo at Free against EML Viewer's $1.99. custodo also leads on update cadence (every 4 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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

custodo is free to download; EML Viewer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EML Viewer ships an update every 2 months, custodo every 4 days. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 8 level
EML Viewer versus custodo: the parameters behind the verdict, then further details
ParameterEML Viewercustodo
Price$1.99Free — better
Rating3.0 (21 ratings) — better—
Positive reviews49.0% of reviews—
Number of ratings21 — better—
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.4 — better
Further details — not scored
Size10 MB62 MB
Age rating4+4+
DeveloperMatrix Logic CorporationMichele Lucchese

Bugs and requests

EML Viewer

Reported bugs

34 issues
  • App crashes frequently
  • App is unusable due to crashes
  • Does not read digitally signed emails
  • Does not open files over 2MB
  • Low memory errors
Show 29 more
  • Poor formatting and link browsing
  • Does not download attached images
  • Only displays email header
  • Does not support dark mode override
  • Clumsy to open files
  • Does not open attachments
  • Does not support Chinese characters
  • Does not display formatted text
  • Cannot open EML files from Calendar app
  • Does not support Reply and Forward
  • Does not open attachments from PEC
  • Blank screen on opening
  • Crashes on some EML files
  • Does not show up in share menu
  • Instructions not clear
  • Money wasted
  • Does not open EML files
  • Garbled Japanese characters
  • Does not open PDF attachments
  • Crashes browser
  • Does not open EML files on iPad
  • Does not support ISO2022JP
  • Does not display To/Cc Japanese names correctly
  • Price is slightly high
  • Does not support Outlook MSG to EML conversion
  • Does not support EML files from Lotus Notes
  • Does not allow printing or PDF export
  • Forwarding not compatible with default mail apps
  • Does not display external images by default

Requested features

12 requests
  • Dark mode option
  • Option to create folders
  • Ability to print messages
  • Forwarding function
  • Prevent external images from loading by default
Show 7 more
  • Support for ISO2022JP character encoding
  • Support for Lotus Notes EML files
  • Improved handling of To/Cc Japanese names
  • Improved link browsing controls
  • Support for digitally signed emails
  • Support for emails over 2MB
  • Improved memory management

custodo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

EML Viewer

No in-app purchases

None

custodo

No in-app purchases

Questions

Is EML Viewer free?
EML Viewer costs $1.99, with no in-app purchases.
Is custodo free?
custodo is free to download, with no in-app purchases.
Do EML Viewer or custodo have ads?
Neither EML Viewer nor custodo shows ads.
Which is updated more often, EML Viewer or custodo?
EML Viewer ships an update every 2 months, and custodo every 4 days. Most recently, EML Viewer was updated on November 6, 2026 and custodo on November 10, 2026.

Other comparisons