VuSitu vs Bad Elf Flex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VuSitu
Easily connect to water monitoring instruments to view, manage, and share water quality and quantity data. Configure, calibrate, and deploy instruments, view live readings, and set up logs. Securely store and share data through a cloud-based account.
- Connect to In-Situ instruments
- View live water quality data
- Configure and calibrate instruments
- Create and manage log files
- Secure cloud data storage
- Share data via HydroVu
- Instant graphing for readings
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Connect the VuSitu mobile app to In-Situ Inc. water monitoring instruments and telemetry to easily view, manage and share water quality and quantity data. Use any Bluetooth-enabled mobile device to configure, calibrate and deploy your instruments, view live readings, and set up logs. Log in to your HydroVu account for secure data storage and sharing. A user-friendly walkthrough makes it easy to set up log files of all types, even with delayed starts or offset entry. View real-time data on multiple water quality parameters, run low-flow sampling events from your phone, and quickly share your data with colleagues via HydroVu. The VuSitu mobile app makes it easy to: • Interface with In-Situ Inc. instruments • Configure VuLink telemetry devices • Gather real-time water quality and water level data • Create logs and manage log data for all supported instruments • Open data files in Excel or parse into other systems • Securely store all data files in the cloud • Calibrate your instruments • Use instant graphing to determine when to start and stop readings • Receive firmware updates for connected instruments and communication devices with embedded automatic updates or custom downloaded files • View data for conductivity, optical dissolved oxygen (DO), ORP, pH, turbidity, water level/pressure, temperature, ammonium, nitrate, chloride sensors, chlorophyll a, phycocyanin (BGA-PC), phycoerythrin (BGA-PE), FDOM, crude oil, rhodamine WT, fluorescein WT • Define geographic locations with GPS coordinates and photos • Select measurement units • Run low-flow sampling events with your Aqua TROLL 400/500/600 using managed workflows on your phone VuSitu is currently available for the Level TROLL®, Rugged TROLL®, Aqua TROLL®, MPX4, VuLink®, RDO® Blue, and RDO® handheld instruments, for surface water, groundwater, coastal, wastewater, drinking water and aquaculture applications.
Bad Elf Flex
This utility app enhances the functionality of Bad Elf Flex and Flex Mini GNSS receivers. It allows users to monitor hardware health, adjust settings, and update firmware. For the Flex model, it also enables the purchase and application of tokens for advanced features and correction sources like SBAS and RTK.
- Monitor GNSS receiver health
- Change hardware settings
- Perform firmware updates
- Purchase and load Flex Tokens
- Enable hardware-based features
- Access correction sources
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This is the free companion utility app for the flexible, intuitive, and affordable Bad Elf Flex and Flex Mini GNSS receivers. Designed for GIS and survey professionals, the Bad Elf Flex and Flex Mini connect to your iPhone or iPad via Bluetooth and provide high-accuracy location data to ANY and ALL field data collection apps in your workflow. This app allows you to view the health of the Flex and Flex Mini hardware, change settings, and perform firmware updates. For the Bad Elf Flex, the app also supports purchasing and loading Flex Tokens into the hardware for enabling hardware-based features and correction sources. Several correction sources are supported including SBAS, RTK via NTRIP, and Atlas (L-band) satellite corrections. Visit https://bad-elf.com/ to learn more about the Bad Elf Flex and Flex Mini GNSS receivers. NOTES: * This app requires a Bad Elf Flex or Flex Mini to operate. * Our "Bad Elf GPS" companion app supports our legacy mapping-grade receivers: Bad Elf GPS Pro, GPS Pro+, Surveyor, and GPS for Lightning dongle. * Continued use of the GPS running in the background can dramatically decrease battery life.
Screenshots
Verdict
The clearest difference is review sentiment: VuSitu at 100% against Bad Elf Flex's 40%. VuSitu also leads on rating (4.9 vs 3.6) and update cadence (every 6 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases 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.
VuSitu holds the better App Store score, 4.9 against 3.6. Both are backed by a comparable volume of ratings — 16 and 14 respectively. Written reviews point the same way: 100% of VuSitu's written reviews are positive against 40% of Bad Elf Flex's.
VuSitu ships an update every 6 weeks, Bad Elf Flex every 3 months. The most recent releases landed on August 21, 2026 and September 9, 2026 respectively.
| Parameter | VuSitu | Bad Elf Flex |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (16 ratings) — better | 3.6 (14 ratings) |
| Positive reviews | 100.0% of reviews — better | 40.0% of reviews |
| Number of ratings | 16 — better | 14 |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 170 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | In-Situ Inc. | Bad Elf, LLC. |
Customer experience
VuSitu
Bad Elf Flex
In-app purchases
VuSitu
No in-app purchases
Bad Elf Flex
No in-app purchases








