SimplyTimer vs KesselRUN Running
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimplyTimer
This minimalist app is designed to help you achieve your fitness goals with ease. It offers customizable intervals and background mode to keep your timer running smoothly. Enhance your training sessions and stay motivated with this efficient, distraction-free workout companion.
- Easy to use interface
- Customizable intervals
- Background timer mode
- Supports HIIT, Tabata, Boxing, circuit training
- Minimalist design
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Elevate your workouts with the Simple Interval Timer, your new perfect exercise companion. Whether you're into HIIT, Tabata, Boxing, circuit training, or any high-intensity exercise, our minimalist app is designed to help you achieve your fitness goals with ease. *Key Features:* - *Easy to Use:* Kickstart your workouts with a single tap, thanks to our hassle-free user interface. - *Customizable Intervals:* Tailor the number of sets, workout duration, rest time, and more to fit your needs, optimizing your training sessions. - *Background Mode:* Keep your timer running smoothly in the background, even when your device is locked, ensuring you stay on track with your workouts. Enhance your training sessions, stay motivated, and track your progress effortlessly with the Simple Interval Timer. It's the ultimate tool for efficient, distraction-free workouts. Experience the simplicity and effectiveness of the Simple Interval Timer today. Download now to elevate your fitness journey! Your feedback is valuable to us, feel free to share your experience and help us improve.
KesselRUN Running
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KesselRUN stands out from traditional running apps. It is not another “go farther, longer, slower” distance tracker. It is a free, privacy-first interval running app and HIIT coach built to make every minute count. KesselRUN is the ultimate non-distance alternative to mainstream running apps—and it is completely free and ad-free! Instead of asking you to jog forever or rack up endless walking miles, KesselRUN guides you through high-intensity run/walk intervals: bursts of hard running, intentional recovery, and repeatable workouts that keep training exciting. HIIT-style running helps you burn more calories in less time, challenge fast-twitch muscle fibers, improve cardiovascular conditioning, and build fitness without turning every workout into a long slog. Think of it like a coach in your pocket yelling, “Punch it!” — then giving you permission to recover before the next blast. The Ultimate Audio Freedom: Customizable Spoken Cues: Most running apps lock you into generic, pre-recorded audio prompts. KesselRUN changes the game. With our fully customizable text-to-speech (TTS) engine, you control exactly what your coach says and when they say it. Create Your Own Prompts: Type out custom voice commands for interval changes, halfway marks, or countdowns. Edit Cues on the Fly: Add, tweak, or completely change any audio notification to match your personality, humor, or motivational style. Hands-Free Focus: Get clear, real-time spoken guidance without ever having to unlock or look at your phone screen. Why KesselRUN Beats Other Running Apps: • Interval-First Architecture – Built from the ground up around timer-based interval running, not retrofitted from a GPS distance tracker. • Fully Customizable Programs – Create structured training plans that match your goals, current fitness, available time, and preferred intensity. • Fully Customizable Workouts – Tune warmups, cooldowns, run segments, walk/recovery segments, rounds, and timing so your workout fits you. • HIIT for Maximum Calorie Burn – Short, intense efforts raise workout intensity and make limited training time highly effective. • Fast-Twitch Stimulation – Sprint-style intervals recruit powerful muscle fibers that steady walking and easy jogging ignore. • Cardio Without the Boredom – Push, recover, repeat, and finish feeling like you actually trained. • Privacy-First by Design – No location tracking. No route maps. No ad network tracking. No background network tracking. Your run data is your business, not someone else’s product. Whether you are a beginner looking for a smarter alternative to bloated running apps, a walker ready to add powerful bursts, or a runner wanting more intensity without longer mileage, KesselRUN is your simple, private interval coach. Perfect For: • Run/walk HIIT sessions & sprint workouts • Weight-loss-focused cardio training • Beginner-friendly custom running plans • Time-efficient, high-intensity cardio days You control the workout. You control the cues. You control your data. Train faster. Burn brighter. Run the KesselRUN. Disclaimer: Always train within your ability, warm up properly, and consult a qualified health professional before starting a new high-intensity exercise program if you have health concerns. KesselRUN is part of the KesselFIT.com family.
Screenshots
Verdict
The clearest difference is update cadence: SimplyTimer at every 2 days against KesselRUN Running's every 9 days. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SimplyTimer ships an update every 2 days, KesselRUN Running every 9 days. The most recent releases landed on August 25, 2026 and September 19, 2026 respectively.
| Parameter | SimplyTimer | KesselRUN Running |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 94.1% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 23 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Maurice-Nikita Rafael Reichert | ThreeLees LLC |
In-app purchases
SimplyTimer
No in-app purchases
KesselRUN Running
No in-app purchases





