Joos vs CardsMaster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Joos
Never worry about a dead phone again. This app helps you find nearby charging stations to power up your device on the go. Simply scan a QR code, charge, and return the device at your convenience.
- Find nearby charging stations
- Scan QR code to rent
- Charge on the move
- Flexible return options
- Discover promotions
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Joos Power provides the ultimate solution to your phone running out of battery whilst you’re on the move. The service is simple; find your nearest station, scan the QR code, charge on the move, and return at a time and place convenient for you – all through our easy-to-use app. Download today and never worry about a dead phone ruining your day again & discover all sorts of promotions and added extras
CardsMaster
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Manage Your Sports Card Collection — All in One App. Organize and explore your sports card collection with ease. CardsMaster app supports american football, baseball, basketball, hockey, and soccer cards, each with its own dedicated space, so every sport stays clearly separated and easy to manage. Switching between sports is fast and effortless. For every card, you can store both front and back images, along with a wide range of custom details and notes. Whether you’re a casual collector or more detail-oriented, all important information is always close at hand. Need a better way to review your collection? Create A4-sized PDF files with enlarged card images for comfortable viewing or archiving. Perfect for browsing your cards on a bigger screen or keeping offline records. You can also assign custom statuses to both cards and the players featured on them, helping you track condition, availability, importance, or any system that fits your collecting style. 100% local storage. All card data and images are stored entirely on your device. Nothing is uploaded, synced, or stored externally — your collection stays fully private and always under your control. Card-level customization Personalize each card’s appearance in detail — from font colors and visual themes to the tools shown on the card. Customization is applied per card, so every card can look and function exactly the way you want. Simple to use, flexible, and built for modern collectors — this app makes managing sports cards clear, visual, and effortless. Your data, your choice You can store as much or as little information as you like for each card — from just front and back images to extensive custom details. The app does not automatically fetch or generate any data; everything is added by you. That said, a lot of care has gone into the app’s design to make entering and managing data as smooth and effortless as possible, even when working with larger collections. More data, more value The more information you add to your cards, the more useful the app becomes. For example, when you enter a player’s date of birth, the app automatically shows the player’s age in years, months, and days, giving you instant, meaningful insights from your data. Bring your cards to life with Pull Rate. Pull Rate shows which cards you naturally come back to the most. By tracking how often you view each card, the app highlights the cards that matter most to you. You can easily see which cards have been your most viewed and “hottest” during a selected time period, such as the last month or the past year — turning everyday browsing into meaningful insight. CSV import & export You can export and import your card data using CSV files, making it easy to move most of your collection data to an external spreadsheet or bring it back into the app. This allows flexible editing and bulk management of information. The CSV transfer includes most card data, but images are not included and remain stored locally on your device. Built with care — and constantly improving The app is actively developed and updated regularly with improvements and new features. We genuinely value user feedback and use it to guide future updates and refinements. If you have ideas, suggestions, or feature requests, we’re always happy to hear from you — this app is built together with its users. Independent and brand-neutral. This app is not affiliated with any sports league, team, player, or card manufacturer. It is an independent, brand-neutral tool designed solely to help you manage and enjoy your own card collection.
Screenshots
Verdict
Joos and CardsMaster 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Joos ships an update every 3 weeks, CardsMaster every 6 weeks. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.
| Parameter | Joos | CardsMaster |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (27 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 27 — better | — |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Silcs Solutions Ltd | Anssi Hakkarainen |
Bugs and requests
Joos
Reported bugs
14 issues- Charger lead faulty
- Return didn't work properly
- First battery did not charge
- Power bank did not charge phone
- Machine took money but didn't work
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- Chargers not working
- Charged as if not returned
- Power bank ran out of charge quickly
- Power bank didn't charge phone
- No charge in the power bank
- Charger cable needs to be pushed
- App requires internet and battery to sign up
- Map not accurate for station locations
- Charging ports everywhere now
Requested features
7 requests- Improve charging speed
- Offer better value for money
- Provide an exchange option for faulty cables
- Make pricing clearer in the app
- Support fast charging
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- Make charging stations more available
- Invest in better quality power banks
CardsMaster
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Joos
No in-app purchases
CardsMaster
No in-app purchases









