RUN interval vs SunTan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RUN interval
This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.
- Customizable interval sessions
- Time and distance targets
- Distance Goal option
- Audio and visual feedback
- Detailed run summaries
- Apple Watch app
- Strava sharing
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Easily set up and record your Interval and Fartlek running sessions. With the flexibility of using time and/or distance as interval targets for your "Hard", "Easy" and "Rest" efforts. The simple but highly configurable interface on your phone and watch will have you running sooner. Now with a Distance Goal option for your session. Along with great audio and visual feedback, detailed post-run summary, share your runs to Strava, and a full-featured Apple Watch app. You can also record your regular runs with voice-over calling out distance and pace feedback. Key Features: • Easily create flexible custom interval sessions. • Utilize three effort targets "Hard", "Easy" and "Rest" in each set, targeting time or distance (meters or miles). • You can "Skip" any of the three efforts to create flexible sets, like building a progressive intervals session. • NEW: Set a Distance Goal for your session, that repeats the sets from the start until the distance has been reached. • Set a Warm-Up and Warm-Down timer or distance around your session. • Clear and easily glanceable visuals and audio prompts, including vibrations. • Voice-over prompts to save you from looking at the screen, great for iPhone or headphone users. • Voice-over prompts include the upcoming intervals effort and time/distance amount, and your last intervals average pace and heart rate. • Full-featured Apple Watch App! • Heart Rate Zones! (see description below) • Indoor Mode, no GPS, for treadmill running. • Sound Mode, for normal, discrete or silent audio prompts on your watch. • Vibration feedback on both the phone and watch. • Detailed run summary, showing pace for hard and easy efforts. • The run summary also includes interval breakdown, distance breakdown and heart rate details. • Play music or podcasts while running and still hear the audio prompts. • Sharing. Share a summary photo with your friends. • Private data. We don’t send any of your data to a server or share it with anyone. Session Types: • Normal Run – Record a normal run, long or short. • Record Intervals – If you run with a group or do an undefined session, then use the Record Interval option. It allows you to manually change between "Hard" and "Easy" reps, allowing you to record your session. • Custom Intervals – Our fully flexible intervals that allow you to use time and/or distance for the efforts. Add multiple intervals sets together to create the session you want. Sharing: From the summary screen, you can share your runs with friends or across social media. If you want to share directly with friends or across other social media, you can share a summary image with the details of your run. Heart Rate Zones: (Apple Watch Only) Zones are displayed as grouped percentages of your maximum heart rate. Giving you an indication of your current work rate based on your current heart rate. Just enter your maximum workout heart rate into our Settings screen and they will display on your Watch the next time you run. Zone 1: Very Light Effort 50-60% (Gray) Zone 2: Light Effort 60-70% (Blue) Zone 3: Moderate Effort 70-80% (Green) Zone 4: Hard Effort 80-90% (Yellow) Zone 5: Maximum Effort 90-100% (Red) Privacy: We don’t want to know where you have run, that's for you to worry about. We don’t send any of your data to a server or share it with anyone you don't want too. We keep your running records safe in Apple Health so you have control. Apple Heath gives you the control over who accesses your data. We only write and read the data we record from your running. Feedback: And because we don't send any data to a server, we need you to send us feedback and suggestions. Hit the Support link below or visit our website to contact us.
SunTan
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SunTan turns your skin type, local UV, SPF, and tanning goal into a personalized sun exposure routine. Instead of showing only a UV number, SunTan builds a practical plan: an estimated session time, body-side rotation timers, a burn-risk countdown, a vitamin D estimate, recovery reminders, and your exposure history. TODAY'S SKIN PLAN Open the app to a personalized session built from your Fitzpatrick skin type, today's local UV, and your selected SPF — with a recommended session length and recovery window. TAN PROTOCOL SCORE A daily 0–100 readiness score tells you whether today suits your plan, factoring UV timing, burn risk, recovery status, cloud cover, and SPF match. SPF-AWARE ROUTINE TIMER Session timing adjusts to your skin type, local UV, and the sunscreen you're using — and shows the exact inputs it was built from. BODY-SIDE ROTATION Follow a guided front, back, and side routine with step timers so exposure stays even and structured. BURN-RISK COUNTDOWN Track your time in the sun with an educational burn-risk estimate. RECOVERY GUIDANCE Know when your next session is recommended based on your recent exposure — plan around your skin, not just today's weather. VITAMIN D ESTIMATE Estimate your sunlight progress from UV, skin type, and time outside. WIDGETS & REMINDERS Keep your plan, score, and timers on your home and lock screen. SunTan provides educational estimates only and is not medical advice. UV exposure can increase the risk of sunburn and skin cancer. Always follow local guidance and consult a medical professional for health concerns. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ PRIVACY POLICY: https://trysuntan.com/privacy.html
Screenshots
Verdict
The clearest difference is device support: RUN interval at 3 against SunTan's 1. RUN interval also leads on iOS requirement (15.6 vs 18.6). 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. RUN interval sells 2 one-off in-app purchases and SunTan sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | RUN interval | SunTan |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1K ratings) — better | — |
| Positive reviews | 77.1% of reviews | — |
| Number of ratings | 1K — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 34 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | CAN YOU HEAR ME SOFTWARE | TOMAZ OVSENJAK |
In-app purchases
RUN interval
- The full RUN interval$1.99
- The full RUN interval$3.99
SunTan
- SunTan Weekly3 Days trial$5.997 Days
- SunTan Annual$49.991 Year









