bloomWatch vs ZEFNET Charge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
bloomWatch
This app allows users to document and track the occurrence of freshwater algae blooms. Your submissions help scientists and public health officials monitor water quality and manage resources for recreation and potable water.
- Document algae bloom occurrences
- Track bloom location and frequency
- Contribute to water quality monitoring
- Support scientific research
- Report potentially harmful blooms
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Blooms are visibly abundant proliferations of freshwater algae and have the potential to cause risks to human and animal health. Their occurrence is presently not well documented. bloomWatch is an App that has been developed to track and document the occurrence of these potentially harmful algal blooms. Your input using this App will provide documentation as to the location and frequency of potentially harmful bloom events, helping scientists, water quality managers, and public health officials effectively track and manage the water resources that the public depends on for potable water and recreation.
ZEFNET Charge
Find and use public electric vehicle charging stations. Monitor and control your home charging unit, with options to override utility program restrictions for emergency charging.
- Find public chargers
- Start/stop charging sessions
- Secure in-app payments
- Monitor home charger usage
- Control home charger
- Override charging restrictions
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Access ZEF Energy's public chargers and your ZEFNET-enabled charger at home. This app provides access to ZEF Energy's network of public chargers, allowing drivers to find a charger, start/stop a charging session and pay for their session costs in a secure and simple way. It also provides drivers with a ZEFNET-enabled charger a way to monitor and control its usage. If your charger is participating in a utility program which restricts charging at certain times, this app provides the ability to override some program restrictions in order to charge in an emergency.
Screenshots
Verdict
The clearest difference is rating: bloomWatch at 3.6 against ZEFNET Charge's 2.0. ZEFNET Charge's advantage is review sentiment (10% vs 0%) and iOS requirement (11.0 vs 13.0). On price, ratings volume, update cadence and ads 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.
bloomWatch holds the better App Store score, 3.6 against 2.0. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews complicate that: 0% of bloomWatch's written reviews are positive against 10% of ZEFNET Charge's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.
| Parameter | bloomWatch | ZEFNET Charge |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (12 ratings) — better | 2.0 (6 ratings) |
| Positive reviews | 0.0% of reviews | 10.4% of reviews — better |
| Number of ratings | 12 — better | 6 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 216 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | United States Environmental Protection Agency (USEPA) | ZEF Energy Inc. |
Customer experience
bloomWatch
ZEFNET Charge
In-app purchases
bloomWatch
No in-app purchases
ZEFNET Charge
No in-app purchases
