Calmset vs Parallel Rest Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calmset
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Calmset gives you one thing and does it well: precise rest timing between sets, based on exercise science. Rest periods matter. Too short and you leave strength on the table. Too long and you lose the metabolic stimulus. Calmset takes the guesswork out with evidence-based presets tuned to your training goal. EVIDENCE-BASED PRESETS • Strength: 3–5 minutes — full phosphocreatine recovery • Hypertrophy: 60–90 seconds — optimal metabolic stress • Endurance: 30–45 seconds — sustained cardiovascular demand • Set your own duration with Pro GUIDED BREATHING BETWEEN SETS • 8 structured breathing patterns during rest intervals • From quick activation to deep recovery • Each pattern grounded in peer-reviewed sports science • Visual breathing guide synced to your rest timer WORKS WHERE YOU NEED IT • Background and lock screen — no need to keep the app open • Apple Watch companion with guided breathing • Live Activity and Dynamic Island support • Haptic and sound alerts when rest ends MULTI-SET TRAINING • Queue sets and let the timer count them down • Auto-advance moves you through sets hands-free • Weekly Pulse — training summary with week-over-week trends • Session history to track rest patterns over time DESIGNED FOR THE GYM FLOOR • Dark, minimal interface — reads clean between sets • No account required. No data collection. • No ads. No subscriptions. • 14 languages supported CALMSET PRO — $4.99 LIFETIME One purchase. Yours forever. • Unlimited sets per session • Custom rest durations • Auto-advance between sets • Live Activity and Dynamic Island • Apple Watch companion • Full session history Built by a sports physiotherapist with over a decade of clinical experience. Proper rest between sets is one of the simplest ways to improve your training — and most people get it wrong.
Parallel Rest Timer
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I built this app because I was tired of overly complicated workout trackers. I didn't want to click through menus logging my reps, sets, and weight records just to finally start a simple rest timer. If you just want to start your workout and time your breaks, this is the app for you. It does exactly what it says: lets you start a workout session and run multiple rest timers at the same time, right from your wrist. What it does: - Closes your rings: It starts a real watchOS workout session, so your heart rate is tracked and your active calories count toward your Apple Health rings. - Phone-free: Works entirely on your Apple Watch so you can leave your phone in your locker or at home. - Concurrent timers: Run multiple break timers in parallel. - Not just for lifting: You can select different activity types, making it just as useful for running, HIIT, yoga, or any other workout outside the weight room. - 100% Private: This app maximizes your privacy. It doesn't even ask for internet access, requires no accounts, and does zero tracking. Your data never leaves your device. No fluff, no mandatory data entry, and no tracking. Just start your activity, and time your rests.
Screenshots
Verdict
The clearest difference is in-app purchases: Parallel Rest Timer at none against Calmset's 1. Calmset's advantage is iOS requirement (16.2 vs 18.0). On price, update cadence, 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. Calmset sells 1 one-off in-app purchase. Parallel Rest Timer asks for nothing beyond the download.
Calmset ships an update every 5 days, Parallel Rest Timer weekly. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.
| Parameter | Calmset | Parallel Rest Timer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 16.2 — better | 18.0 |
| Further details — not scored | ||
| Size | 31 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | CANER OZBEK | Remigiusz Herba |
In-app purchases
Calmset
- Calmset Pro$4.99
Parallel Rest Timer
No in-app purchases
Questions
Is Calmset free?
Is Parallel Rest Timer free?
Do Calmset or Parallel Rest Timer have ads?
Which is updated more often, Calmset or Parallel Rest Timer?
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