Simple One vs Dromos
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple One
This app helps you accurately determine your one-rep max (1RM) using multiple proven formulas. It provides reliable estimates to help you choose the right weights for your training, ensuring safer and more effective strength progression.
- Accurate one-rep max estimates
- Multiple proven calculation formulas
- Determine training weights
- Fast and simple interface
- Distraction-free design
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Stop guessing your max. Train with confidence. Simple One Rep Max Calculator helps you understand how strong you really are — so every workout has a purpose. By calculating your one-rep max using multiple proven formulas, you get realistic numbers you can trust, not just a single estimate. Know your limits, choose the right weights, and progress safely — whether you’re pushing for new PRs or building strength over time. Why you’ll love it • Clear and reliable max lift estimates • Multiple formulas for better confidence • Training weights at the right intensity • Fast, simple, and distraction-free Less guessing. Better progress.
Dromos
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Your 70.3 coach. Built around your numbers, your schedule, and your race. Most apps hand you a template. Dromos coaches you — building your plan from scratch based on your current fitness, your race date, and the time you actually have to train each week. Coaches you from your real fitness Dromos uses your FTP, VMA, and CSS to set the right intensity for every swim, bike, and run. Pick your 70.3, set your goal, and get a periodized plan with Base, Build, Peak, and Taper phases scaled to where you are today — not where someone else's spreadsheet assumes you are. Fits the week you actually have Tell Dromos which days you can swim, bike, and run — and how long you have on each one. Your training is shaped around your life, not the other way around. Every session, explained Each workout comes with coaching notes: the purpose, the adaptation it targets, where it sits in your periodization, and what to focus on while you train. So you're not just ticking boxes — you understand what you're building. Syncs with Strava Connect Strava and Dromos automatically matches your completed activities to your planned sessions. See actual duration, distance, power, pace, and heart rate next to what was planned — so you always know how your training is tracking. Everything in one place Your full plan, week by week. Structured workout steps with intensity graphs. Strava data matched to your sessions. A rolling home view that always shows where you are in your training. Dromos is for athletes preparing for a 70.3 who want a real coach — one built around their numbers, their schedule, and their race.
Screenshots
Verdict
The clearest difference is price: Dromos at Free against Simple One's $0.99. Dromos also leads on update cadence (every 11 days vs every 13 months). Simple One's advantage is iOS requirement (16.0 vs 18.0). On ads, in-app purchases 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
Dromos is free to download; Simple One costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Simple One ships an update every 13 months, Dromos every 11 days. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.
| Parameter | Simple One | Dromos |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 13 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 5 MB |
| Age rating | 17+ | 4+ |
| Developer | Above AS | Emmanuel Breard |
In-app purchases
Simple One
No in-app purchases
Dromos
No in-app purchases









