Running Writings Lab Downloads & RevenueRunning Writings Lab · App Store
Running Writings Lab is #4 in Sports Paid in United Kingdom and charting in 5 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
26 Oct 2026Running Writings Lab update history & changes
Last change · 16 events since 23 Oct 2026Full timeline ↓Full timeline · 16 events
- ✏️Running Writings Lab: description updated· 7 countries
- ✏️Running Writings Lab: new iPad screenshots· 7 countries
- ✏️Running Writings Lab: new screenshots10 screenshots (was 10) · 7 countries
- 📦Running Writings Lab updated to version 1.1.0Now featuring an altitude-adjusted pace calculator!
• New calculator: Altitude-Adjusted Pace. Calculate adjustments for races and workouts at altitude, with adjustments for home altitude acclimation as well. Tap "Use current altitude" to auto-fill with your current elevation.
• Track Wind Calculator now features local weather. Tap "Use current weather" to fill in the current wind speed, just like in the regular wind calculator.… more - 📈Running Writings Lab hit #1Top Paid · Sports · SA
- 📈Running Writings Lab charting in a new countrySaudi Arabia
- 📈Running Writings Lab entered the top 100Top Grossing · Sports · SA
- 📈Running Writings Lab entered the top 100Top Grossing · Sports · BR
- 📈Running Writings Lab charting in a new countryNetherlands
- 📈Running Writings Lab entered the top 10 in 4 chartsTop Paid · Sports · BR · Top Paid · Sports · FR · Top Paid · Sports · IT · Top Paid · Sports · US
- 📈Running Writings Lab new best rank in the overall chart: #90Top Paid · All Apps · GB
- 📈Running Writings Lab entered the top 100Top Paid · All Apps · GB
- 📈Running Writings Lab charting in a new country in 3 chartsBrazil · Italy · United States
- 🆕Running Writings Lab first spotted by AppInsider#94 in Top Paid · All Apps · Canada
- 📦Running Writings Lab version 1.0.0No release notes
- 🆕Running Writings Lab released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Sports PaidRunning Writings Lab at a glance
AI summary written from our chart and store data, 2026-11-08. It can be wrong: check the numbers above.
A premium, offline-first iOS app offering eleven scientific running calculators for pace prediction, threshold analysis, and environmental adjustments, designed for serious runners seeking research-based training tools. The app is currently ranking in the top 25 paid sports apps across multiple international markets including Great Britain, Brazil, Australia, South Africa, and France, indicating strong niche appeal despite a low rating count of two reviews.
Similar apps: RunCalc, Jack Daniels' Running Formula, TrainingPeaks
Running Writings Lab on the App Store
App details
App privacy Measured
Running Writings Lab’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 0 linked to your identity and 1 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
Where Running Writings Lab's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| United Kingdom | SportsPaid | #4 |
 United States | SportsPaid | #43 |
 Brazil | SportsPaid | #10 |
 Australia | SportsPaid | #29 |
 Saudi Arabia | SportsPaid | #22 |
Apps near Running Writings Lab on the chart
Sports Paid, around #4.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about Running Writings Lab
From recent reviews.
About Running Writings Lab
PACING & PREDICTION
• Race Pace: finish times, splits, and pace conversions for any track, XC, or road distance, including custom distances.
• Pace Percentage: calculate paces for Canova-style percentage-based workouts.
• Power Law: predict your performances across a wide range of race distances using a power law model.
THRESHOLD & PHYSIOLOGY
• Critical Speed: fit a research-grade critical speed model using race or time trial performance.
• CV, LT2, and VO₂max Pace: calculate physiologically based workout paces from any race distance 10k and under.
• LT1 and Zone 2 Pace: get first lactate threshold and Zone 2 pace from a recent 5k result.
TERRAIN & CONDITIONS
• Grade-Adjusted Pace: get GAP adjustments for uphills and downhills.
• Heat-Adjusted Pace: adjust long workout paces for heat and humidity.
• Wind-Adjusted Pace: see what a headwind costs and a tailwind gives back on point-to-point road runs and races.
• Track Wind Adjustments: calculate the net effect of wind around the oval, where every lap has a headwind and a tailwind.
• Altitude-Adjusted Pace: convert performance between different elevations and account for acclimation
Every calculator is built on published research and large-scale datasets, with detailed explanations one tap away.
BUILT FOR IPHONE AND IPAD
• Pin your favorite calculators to the top of the menu, and long-press the app icon to jump straight to them from your Home Screen.
• Set paces and times using haptic dials.
• Built-in memory to remember your workout and race paces between sessions.
• Set appearance to dark mode, light mode, or auto.
• Works completely offline. No account, no sign-in.
THE DEAL
One purchase enables every calculator forever. No ads, no subscription, no extra "pro" tier, no tracking, and no analytics. You get the same capabilities as the calculators from Running Writings web tools plus iOS-specific features: offline functionality, haptic dials, input memory, and one-tap access from your Home Screen. Your purchase funds the ongoing research that will power even more scientific running calculators.
WHO IT'S FOR
This app is designed for all runners who take their training and racing seriously. Whether you're a marathoner, track athlete, cross country runner, or trail runner, you'll find the tools you need to plan effective workouts and personal-best races.
Built by John J. Davis, Ph.D. - coach, scientist, author of Marathon Excellence for Everyone, and founder of RunningWritings.com.
Latest updates
Store changes
What Running Writings Lab changed on its store page: name, icon, screenshots, price, size, languages, requirements.
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