Comparison

Koofr vs Congressa

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

Head to head
About

Koofr

Consolidate all your files from various cloud services and local devices into a single, searchable location. Access, back up, and sync your data across platforms with ease, enhancing productivity and file management.

Highlights
  • Unified cloud storage
  • Connect multiple cloud accounts
  • Cross-platform file access
  • File synchronization and backup
  • Universal file search
  • Mobile backup options
Features
Read full description

Koofr offers 10 GB of free safe EU based storage for your files with options to connect multiple cloud accounts - One storage for all. Combine and access all files in one place with ease. Your search ends here. No need to keep multiple application and logins, connect your accounts into one place and have a single search box over all your files. Even those on your computer, your phone and your Dropbox. Invite friends to get even more free space. - Access all your files spread across many locations (private or public) - Connect your existing (even multiple) Dropbox, GDrive and OneDrive accounts. - Backup your files from mobile phone or tablet. - Synchronise and backup files from your computers and servers. - Access everything through a mobile app, webpage or simply setup a network drive through WebDAV. - Search through everything. Save time. Simple as that. Koofr is much more than just another cloud storage for your files. Koofr is the best way to bring all your files to you when and where you need them, whether they are in the cloud or on your home computer. Start managing files smarter and more efficiently, have everything accessible from one app. Koofr lets you access all your files spread across many locations (private or public) through a single, easy to use interface. Easily connect your existing Dropbox, GDrive and OneDrive accounts or a disk on your laptop and browse and search all the content with a single application. Wouldn't you want to look at the photos from your phone on your PC? Or share that presentation you created at work while you're traveling. Koofr is here for you and your file needs. You can finally have all your files available to you on the go, without giving up your privacy. Koofr for iOS gives you additional options to easily backup your photos to the cloud or your PC, the moment you take them. No more worrying about losing your phone or sending photos by email to your PC. Have your files accessible anywhere, look at the photos you took on your iPhone while browsing the internet. It's all about simplicity. But if you want more, log into the web interface and explore everything Koofr has to offer. Koofr is simple and safe cloud file storage, which can be extended with your own on premise storage capacities (such as OpenStack Swift, SwiftStack, Ceph, Amazon S3, CIFS or NFS file servers, Linux servers, Windows workstations and Mac OSX laptops). Sign up now, simplify your life. The cloud has never looked better.

About

Congressa

Features
Read full description

Congressa is your conference programme in your pocket. It works without internet, too. WHY IT EXISTS At conferences I carried a folded paper programme in my jacket and unfolded it at every break to check when my talk was and in which room. I wanted the phone to tell me what is on now, what comes next and where to go, even in a congress hall with no signal. A SIMPLE START 1. Get the programme. Scan the QR code from the organiser or a colleague, paste the programme link, enter the conference website or open the PDF. Your name and an access code are optional. 2. For a programme from a website or PDF, check the recognised days, times and item types (lecture, posters, lunch, break, social programme). Fix anything with a tap. 3. That is it. The programme stays on your phone and the reminders are local: what, when and where, always before it starts. WHAT THE APP DOES • NOW – what is on right now, what comes next and your own next item. • PROGRAMME by day, with talks and posters inside their blocks, authors and paper codes. • MY PLAN – star what you do not want to miss; the app warns you about clashes. • I'M IN THE PROGRAMME – if you present, chair or guide, link yourself to your name: your slots are highlighted and reminded first. • REMINDERS BEFORE TALKS – 5, 10, 15, 30 or 60 minutes, or a time of your own from 1 minute to 12 hours before every item. You also choose what the app reminds you about. • ORGANISER ANNOUNCEMENTS – programme changes and important messages right in the app, when the organiser uses a server. • REGISTRATIONS for workshops, dinner or the social programme, with capacity and a waiting list, when the organiser uses a server. • SHARE BY QR CODE – show the code and a colleague has the same programme within seconds, on iPhone and on Android (more below). • SEARCH by surname finds a talk even inside a block, with or without diacritics. • PLACES with directions in Maps, speakers and contact persons with a call button. • EIGHT LANGUAGES – Slovak, Czech, English, German, French, Spanish, Italian and Ukrainian. You choose the app language yourself. • AI RECOGNITION (optional) reads even messy PDFs and websites, with your own API key or through the organiser's server. SHARING BETWEEN IPHONE AND ANDROID The QR code or invitation link from Congressa opens a small web page that takes care of the rest. If your colleague has the app, the programme opens right away. If not, the page sends an iPhone to the App Store and an Android phone to Google Play. After installing, the same programme loads by itself: automatically on Android, on iPhone with the “Paste programme link” button on the welcome screen. FOR ORGANISERS On Mac and iPad the app is also the conference back office: it imports the programme from a website, PDF, text or calendar, manages rooms, people, presentations and attendees, and publishes the programme to your own server in one click. The optional server sends push reminders, handles registrations with a waiting list and produces attendance lists. PRIVACY No account, no sign-up, no ads, no tracking. The programme and your plan stay on your device. Data leaves it only when you send it yourself: to the organiser's server that you enter, or to the AI recognition you start. If you share a programme by link, only the programme itself is uploaded to the Congressa server, without your name or plan, and it is deleted 30 days after the conference. FREE AND INDEPENDENT Congressa is an independent app and is not made by the conference organiser. It is free and unrestricted: no ads, no tracking, no locked features, no subscription. One physician builds it in his free time, and it is free so that everyone at a congress can have the programme at hand. If it helped you, you can leave an optional tip (a coffee, a lunch or a dinner). It unlocks nothing and only helps keep the app free for others. Author: Ján Šikuta. The app grew out of his own need at congresses. Contact: congressa_main@icloud.com

Screenshots

Koofr4 screens
Congressa4 screens

Verdict

The call

Koofr and Congressa 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.

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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Koofr ships an update every 5 days, Congressa every 3 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

ScorecardNo meaningful differences
Koofr versus Congressa: the parameters behind the verdict, then further details
ParameterKoofrCongressa
PriceFreeFree
Rating3.8 (29 ratings) — better—
Positive reviews53.6% of reviews—
Number of ratings29 — better—
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.017.0
Further details — not scored
Size17 MB7 MB
Age rating4+4+
DeveloperKoofrJan Sikuta

In-app purchases

None

Koofr

No in-app purchases

None

Congressa

No in-app purchases

Questions

Is Koofr free?
Koofr is free to download, with no in-app purchases.
Is Congressa free?
Congressa is free to download, with no in-app purchases.
Do Koofr or Congressa have ads?
Neither Koofr nor Congressa shows ads.
Which is updated more often, Koofr or Congressa?
Koofr ships an update every 5 days, and Congressa every 3 days. Most recently, Koofr was updated on October 6, 2026 and Congressa on October 8, 2026.

Other comparisons