Comparison

Runbuds vs Shape Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Runbuds

This app allows you to run with friends in real-time, seeing each other's avatars on a virtual track. It includes a run tracker with lock screen support, group relay challenges, and detailed performance statistics with shareable visualizations.

Highlights
  • Real-time avatar tracking
  • Live lock screen activities
  • Group relay challenges
  • Detailed run statistics
  • Shareable run visualizations
Read full description

Runbuds is the social running app that is truly built for your friends first. /// THE TRACK /// ・ Your avatar moves around a physical track ・ Your friends move around the track with you ・ Pass (or get passed oh no !!!) by your friends /// LOG RUNS /// Our run tracker lets you choose between: ・ An in-app full screen view ・ Live activities on your lock screen /// GROUP RELAYS /// Run towards a shared goal: ・ Set a total distance target ・ Set a timeframe ・ Add your friends to the Relay ・ Run run run run run !!! /// BEAUTIFUL STATS & VISUALS /// ・ See beautiful visualizations of your past runs ・ Sort by date, pace, distance, or difficulty ・ Share images of your runs with your friends /// GET IN TOUCH /// ・ Hit us up with ANY feedback or requests !!! ・ Contact support@runbuds.app

About

Shape Calendar

Features
Read full description

Shape is a training planner for runners, cyclists and triathletes. It pulls in your workouts and recovery data, shows how your training is going, and lets you plan ahead in the calendar or with Claude and ChatGPT. TODAY See your readiness each morning, from your sleep, resting heart rate and HRV. Training load balance, fitness, fatigue and form, all including what you've planned, so a heavy week shows up before you're overtraining. CLAUDE AND CHATGPT Shape works as an MCP connector. Ask how your last block went, why a run felt hard, or to plan the next four weeks. Claude and ChatGPT read your workouts, sleep and HRV, and write the plan straight into your calendar, and it syncs to your devices. CALENDAR Every sport in one calendar, planned and done, with your weekly load on top. Plan on your phone or the web, and sync your plan to Google or Apple Calendar. BUILD WORKOUTS BY TYPING Type "5x1km at threshold, 2 min easy" and Shape turns it into structured steps, ready for your watch. WATCHES AND APPS Garmin, Apple Watch and Apple Health, Wahoo, Polar and Intervals.icu. Completed workouts, sleep and HRV sync in automatically. Planned workouts go to your Apple Watch, Garmin or Wahoo. WORKOUTS Each run and ride shows the route on a map, charts for pace, heart rate, power and cadence, your laps and time in zones, whichever watch or app recorded it. WHY I BUILT IT I'm Samuel. I ran the Stockholm half marathon with a cold, ended up with pneumonia, and spent months working back from 15-minute walks. I built Shape to plan that comeback and now use it every day to help me train smarter. Terms of Use: https://shapecalendar.com/terms Privacy Policy: https://shapecalendar.com/privacy

Screenshots

Runbuds3 screens
Shape Calendar4 screens

Verdict

The call

The clearest difference is in-app purchases: Runbuds at none against Shape Calendar's 2. Runbuds also leads on update cadence (every 2 days vs weekly) and iOS requirement (18.0 vs 26.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Shape Calendar sells 2 in-app purchases, starting at $4.99 per month. Runbuds asks for nothing beyond the download.

UpkeepUpdate frequency

Runbuds ships an update every 2 days, Shape Calendar weekly. The most recent releases landed on October 30, 2026 and November 12, 2026 respectively.

Scorecard3 real differences · 7 level
Runbuds versus Shape Calendar: the parameters behind the verdict, then further details
ParameterRunbudsShape Calendar
PriceFreeFree
Rating4.8 (69 ratings) — better—
Positive reviews96.3% of reviews—
Number of ratings69 — better—
Update frequencyEvery 2 days — betterWeekly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS18.0 — better26.0
Further details — not scored
Size56 MB19 MB
Age rating4+4+
DeveloperLight NudgeSamuel Christoffer Kraft

In-app purchases

None

Runbuds

No in-app purchases

2 purchases

Shape Calendar

Subscriptions1
  • Shape Pro Monthly14 Days trial$4.991 Month
One-time1
  • Lifetime$99.99

Questions

Is Runbuds free?
Runbuds is free to download, with no in-app purchases.
Is Shape Calendar free?
Shape Calendar is free to download, with in-app purchases available.
Do Runbuds or Shape Calendar have ads?
Neither Runbuds nor Shape Calendar shows ads.
Which is updated more often, Runbuds or Shape Calendar?
Runbuds ships an update every 2 days, and Shape Calendar weekly. Most recently, Runbuds was updated on October 30, 2026 and Shape Calendar on November 12, 2026.

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