Joos vs Synergy+
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
Synergy+
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Mobile Application for Synergy Energy customers. Customers can register for push notifications, see their loadshedding schedules as well as historical messages sent to them.
Screenshots
Verdict
The clearest difference is update cadence: Joos at every 3 weeks against Synergy+'s every 5 months. On price, ads, in-app purchases 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
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, Synergy+ every 5 months. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.
| Parameter | Joos | Synergy+ |
|---|---|---|
| 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 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Silcs Solutions Ltd | SolrBoost Pty Ltd |
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
Synergy+
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Joos
No in-app purchases
Synergy+
No in-app purchases
