EnvLogger Viewer vs Rapagra
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
EnvLogger Viewer
Communicate with contactless temperature loggers using NFC. Configure missions, plot data, and save it as CSV files for easy import into analysis software. Share your data instantaneously.
- NFC communication with EnvLoggers
- Configure missions
- Plot mission data
- Save data as CSV
- Instantaneous data sharing
- Human-readable CSV format
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This application is used to communicate with EnvLoggers via NFC (near field communication). Users can configure missions, plot mission data and save them as CSV files to the iPhone's memory. They can also instantaneously share data. Data are saved as CSV files, which are human-readable and easily imported into R, MatLab, Excel or similar. EnvLoggers are contactless miniaturized temperature loggers. Their main features are: 1. They are sturdy, waterproof, and resistant to UV. Can withstand depths exceeding 500 meters. 2. Their battery life spans over 2 years (sampling at every hour). 3. The memory stores between 10k readings @ 0.1 ΒΊC resolution or 12k readings @ 0.5 ΒΊC resolution. Typically, 14k readings @ 0.1 ΒΊC resolution and 17k @ 0.5 ΒΊC resolution. For reference, 1 year of data at hourly resolution requires ~9K readings. Memory is non-volatile, meaning that data can be retrieved even after battery depletion. 4. The clock drift is of 50 ppm at most. 5. The temperature resolution is of 0.1 ΒΊC. Precision and accuracy are of at least 0.2 ΒΊC. 6. Because the NFC allows for communication at a range of a few cm, it is possible to embed the loggers in the rock and still communicate with them. Refer to www.electricblue.eu for more information. Note: EnvLogger Viewer needs NFC, thus only runs on iPhone 7 or later.
Rapagra
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With our health app you can save at least 30% in direct costs of crop protection products, in addition to labor hours, diesel and other costs. The risk of growing potatoes also remains the same, while you can get more yield from your land. Long before the disease pressure from, for example, Phytophtora Infestans increases, we can tell which plants and which areas will be most affected. In the future, with our camera robot, we can also indicate the risk per plant and intervene early and not spray all organisms afterwards and with a lot of poison.
Screenshots
Verdict
The clearest difference is update cadence: EnvLogger Viewer at every 2 months against Rapagra's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EnvLogger Viewer ships an update every 2 months, Rapagra every 6 months. The most recent releases landed on June 1, 2026 and September 10, 2026 respectively.
| Parameter | EnvLogger Viewer | Rapagra |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | β |
| Update frequency | Every 2 months β better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 2 MB | 45 MB |
| Age rating | 4+ | 17+ |
| Developer | Electricblue, CRL | RapAgra |
In-app purchases
EnvLogger Viewer
No in-app purchases
Rapagra
No in-app purchases









