Boulderthon vs RetroFit!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Boulderthon
Track race day progress with turn-by-turn navigation and real-time updates for friends and family. Stay informed about your race with live tracking features.
- Real-time race tracking
- Turn-by-turn navigation
- Live progress updates for spectators
- Race day information
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The Boulderthon app is for race day tracking to receive turn-by-turn instructions and for your friends and family to track your progress in real-time.
RetroFit!
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I was 75 pounds overweight with a BMI of 32 (in the obese category). To address this, I began going to the gym and realized the need to track my calories. Given my familiarity with software development, I decided to create an app for this purpose. Over the following months, I used an iterative design process to develop the app, focusing on supporting my weight loss journey. I added buttons to track food and workout calories, and included settings to calculate my basal metabolic rate (BMR) to monitor my total daily calorie expenditure. The addition of BMR settings allowed me to understand the significant impact of activity level on daily calorie needs. While calories burned during a workout contribute to weight loss, the increase in metabolism from higher activity levels, as shown in the BMR calculations, played a substantial role in my overall weight loss. Initially developed for personal use, the app underwent multiple design iterations to assist me in my weight loss efforts. As a result, I am no longer obese or even overweight, but at a normal optimal weight according to BMI calculations (BMI is calculated in the app in the passive view). Although my primary goal was personal, I am now publishing RetroFit in the hope that it will help others interested in weight loss and calorie management to better understand their calorie consumption. Notes: In addition to calorie tracking, I followed a whole foods plant-based diet. My favorite music genre to listen to while working out is 80s rock and roll, which inspired the app's 80s-style design, resembling a calculator from that time period, but for calories.
Screenshots
Verdict
The clearest difference is update cadence: Boulderthon at every 3 weeks against RetroFit!'s every 4 months. Boulderthon also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.2). On price, 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.
Boulderthon ships an update every 3 weeks, RetroFit! every 4 months. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.
| Parameter | Boulderthon | RetroFit! |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (6 ratings) — better | — |
| Positive reviews | 36.4% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 101 MB | 1 MB |
| Age rating | 4+ | 17+ |
| Developer | Brooksee, LLC | Nicholas Pompea |
In-app purchases
Boulderthon
No in-app purchases
RetroFit!
No in-app purchases









