Soil Sensor Calculator vs 100k Mentor Challenge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soil Sensor Calculator
This tool helps users calculate irrigation needs based on Watermark sensor readings. It determines average centibar readings, available water, stress levels, and irrigation requirements, factoring in soil type and growth stage.
- Enter Watermark sensor readings
- Calculate average centibar reading
- Determine available water remaining
- Assess soil stress level
- Calculate days to irrigation
- Estimate water required for irrigation
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The calculator allows for the user to enter readings from Watermark brand sensors. The user enters the readings for the rooting depth, the effective rooting depth for the stage of growth, the soil type and the Managed Allowable Depletion (MAD). The app calculates the average centibar reading for the provided values, the available water remaining and provides the stress level. Days to required irrigation can then be easily determined. How much water is required for last irrigation is also calculated and adjusted for irrigation efficiency.
100k Mentor Challenge
Connect with mentors or aspiring leaders to achieve career goals. This app helps diverse college students gain career advice, build networks, and boost confidence. Complete your profile to join the next mentorship match.
- Mentorship matching
- Career advice
- Networking opportunities
- Goal encouragement
- Profile completion
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Inspire the next generation of leaders or get the career advice, network, and encouragement you need to tackle your goals. Replace career anxiety with confidence! Download the app, complete your profile, and join the next mentorship match.
Screenshots
Verdict
The clearest difference is rating: Soil Sensor Calculator at 5.0 against 100k Mentor Challenge's 4.2. Soil Sensor Calculator also leads on ads (none vs shown) and monetization model (free vs ad-supported). 100k Mentor Challenge's advantage is update cadence (monthly vs every 5 months) and ratings volume (19 vs 6). On price, in-app purchases, device support and iOS requirement 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.
Soil Sensor Calculator holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 6 and 19 respectively.
Soil Sensor Calculator ships an update every 5 months, 100k Mentor Challenge monthly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.
| Parameter | Soil Sensor Calculator | 100k Mentor Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | 4.2 (19 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 6 | 19 — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 9 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Chris Henry | ProMazo, Inc. |
Customer experience
Soil Sensor Calculator
100k Mentor Challenge
In-app purchases
Soil Sensor Calculator
No in-app purchases
100k Mentor Challenge
No in-app purchases
Questions
Is Soil Sensor Calculator free?
Is 100k Mentor Challenge free?
Which has better reviews, Soil Sensor Calculator or 100k Mentor Challenge?
Do Soil Sensor Calculator or 100k Mentor Challenge have ads?
Which is updated more often, Soil Sensor Calculator or 100k Mentor Challenge?
Other comparisons
