How do I choose the right Readdle app for my workflow?

Match the task you do most to the app built for it: PDF editing and review to PDF Expert, email to Spark, scanning paper to Scanner Pro, calendar planning to Calendars, general file handling to Documents, and inspection or field-team workflows to Fluix. If your work spans PDFs and general files, the real decision is between PDF Expert and Documents; if you work on a team in the field, Fluix is the only Readdle product on the list aimed at that.

Readdle describes its lineup as an ecosystem of productivity apps for iPhone, iPad, and Mac, built to simplify complex tasks and streamline workflows. The table below maps each app to the job it is presented as doing.

Start with the task, not the app

If PDFs are the core of your work

Choose PDF Expert when reading, annotating, and editing PDFs is the main thing you do. It is the app Readdle positions first and describes as its PDF editor, and the Apple App of the Year recognition signals it is a mature, mainstream choice rather than a niche tool.

If email consumes your day

Choose Spark. Readdle's own page includes a user comment describing email as "a mess" until switching to Spark, and the app carries Apple's Editors' Choice label. The page also notes a recent addition: "Agents that follow through" in Spark, alongside a "Smart Insights" feature for understanding files in one tap.

If paper keeps entering your workflow

Choose Scanner Pro. It is the iPhone and iPad scanning app, and Readdle notes it was upgraded with automated Expense Reports — relevant if you scan receipts or expense documents rather than just archiving paper.

If scheduling is the bottleneck

Choose Calendars. A user quoted on the page compares it to "an evolutionary step up from a basic system calendar," which is the practical distinction: it is for people who have outgrown the default calendar, not for occasional event entry.

Documents vs. PDF Expert: the overlap to resolve

This is the choice most likely to stall you, because both touch files and PDFs.

• Documents is framed as a file-action app — Readdle calls it "the super app for file action," and a quoted review says it stands apart from Apple's Files app because it adds more PDF features and MP3 functionality. Choose it when your work mixes file types: managing, converting, playing, and occasionally touching PDFs.
• PDF Expert is framed narrowly as a PDF editor. Choose it when PDFs are the deliverable — contracts, marked-up drafts, forms — and you want depth there rather than breadth across formats.

A simple test: if you would describe your week as "handling lots of different files," start with Documents. If you would describe it as "working through PDFs," start with PDF Expert.

When the answer is Fluix

Fluix is the outlier: inspection management software for field teams, recognized as a High Performer by G2. The individual apps above are for personal productivity; Fluix is for teams doing structured field work such as inspections. If you are choosing for yourself, it is likely not your app. If you are choosing for a field team that fills out and manages inspection records, it is the only Readdle product on this page built for that.

Context worth knowing before you commit

• Scale and maturity: Readdle reports 235+ million product downloads, 300+ employees, 8 hubs worldwide, and 18 years on the market, with team members in 30 countries. That matters mainly as a signal that the apps are actively maintained — the page's news section references readiness for iPhone Duo from day one.
• Pricing: The page references an "upgrade" path but does not publish prices or plan details. Check each app's own listing for current terms rather than assuming a free tier.
• Platform fit: The lineup is positioned for iPhone, iPad, and Mac. If your workflow runs on other platforms, verify per-app availability before standardizing on it.

A quick decision path

1. Write down the single task that takes the most time each week.
2. If it is PDFs → PDF Expert. Email → Spark. Scanning → Scanner Pro. Scheduling → Calendars.
3. If it is mixed file handling → Documents; add PDF Expert only if PDF depth becomes a recurring gap.
4. If the task belongs to a field team doing inspections → Fluix.
5. Confirm current pricing and platform support on the individual app page before rolling anything out to others.