RowingSTEM vs AstroAlert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RowingSTEM
This app supports a rowing curriculum by collecting and analyzing real-time data from Concept2 rowing machines. It helps students understand science and math concepts through rowing metrics and provides exportable data for further analysis.
- Real-time rowing metric collection
- Data analysis with graphing
- Exportable CSV data
- Power output calculation for device comparison
- Access to PDF curriculum materials
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Power Ten Development, LLC in partnership with Tulsa Youth Rowing Association has developed an app to help support the gROW Tulsa RowingSTEM Curriculum. The app works with the Concept2 rowing machine equipped with a PM5 monitor. The RowingSTEM app allows outreach programs and rowing clubs the chance to provide learning experiences to help develop and reinforce science and mathematical concepts in relation to rowing. Data collection functionality allows for quick and easy export to a Comma Separated Values file to email, text or airdrop to other devices and programs. Features Real-time data collection and deriving of the following metrics. Stroke Number Time Elapsed (Seconds) Distance (Meters) Stroke Rate (Strokes/Minute) 500m Split (seconds) Power per stroke (Watts) Heart Rate (Beats Per Minute) * User needs a heart rate monitor belt for this functionality Peak Force (Newtons) Average Drive Force (Newtons) Drive Length (Meters) Drive Time (seconds) Derived: % of stroke complete when peak force is reached Derived: Impulse (Average force x time)Work Per Stroke (Joules) Derived: Stroke Speed (Meters/Second) Force Curve Points for each force curve. (disclaimer, these points are not absolute points but can be taken relative to each other for analysis of the overall shape of the force curve) Please also note that the force curve is not available with older versions of the PM5 monitor. Data Analysis Rowing data can now be analyzed using a graphing screen. Users can select which variables they want to plot on the X and Y axis. Users have two options 1) A scatter plot graph which allows for any two variables to be plotted on the x and y axes. 2) A line graph which allows for plotting on any variable against time, distance or stroke count. Exporting Data The metrics above are stored in a CSV file and can be exported from the app via various forms of transmission (text, email, etc...) How Much Power Can You Create Lab Activity? Students can synchronize the app to the PM5 monitor and receive real-time feedback on the type of electrical device they could power at their current level of power output in Watts. RowingSTEM Curriculum Access Access to the RowingSTEM curriculum in PDF format. These lab activities can be exported from the app to aid in the creation of hard copies for students to work on while working through RowingSTEM based activities.
AstroAlert
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AstroAlert turns your phone into a personal space control center. See which satellites, planets and deep-sky objects are passing above your location with NASA-grade accuracy. Explore educational content, the NASA Photo of the Day, and unlock over 1,000 detailed celestial object sheets with AstroAlert+. Main Features: • Satellite pass tracking based on your location • Planets, Moon, Sun and deep-sky objects • Only events above 70° for spectacular visibility • Full astronomy glossary • Solar System animation • NASA Photo of the Day • Immersive interface inspired by mission control AstroAlert+ Premium Features • Automatic personalized alerts • 1,000+ detailed celestial objects • Deep-sky objects fully unlocked • Early access to new features • Complete, unlimited experience AstroAlert: the sky above you — revealed with precision, clarity and wonder. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://astroalert.app/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: RowingSTEM at none against AstroAlert's 1. RowingSTEM also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (12.0 vs 14.0.0). On price, ads 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. AstroAlert sells 1 in-app purchase, starting at $2.99 per month. RowingSTEM asks for nothing beyond the download.
RowingSTEM ships an update every 5 weeks, AstroAlert every 5 months. The most recent releases landed on October 3, 2026 and September 25, 2026 respectively.
| Parameter | RowingSTEM | AstroAlert |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 5 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 14.0.0 |
| Further details — not scored | ||
| Size | 73 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Power Ten Development LLC | THEO BERNARD ROBERT PARAMELLE |
In-app purchases
RowingSTEM
No in-app purchases
AstroAlert
- AstroAlert+ Mensuel$2.991 Month
Questions
Is RowingSTEM free?
Is AstroAlert free?
Do RowingSTEM or AstroAlert have ads?
Which is updated more often, RowingSTEM or AstroAlert?
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