Zolt vs Simple Insights
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zolt
This app provides intelligent, personalized coaching to help users achieve their fitness goals, whether it's losing fat, building muscle, or maintaining healthy habits. It uses an adaptive TDEE algorithm that adjusts calorie and macro targets daily based on individual progress, workouts, and recovery.
- Adaptive TDEE and macro recalculation
- Personalized calorie goals for cutting, bulking, or maintaining
- Smart food logging with AI and barcode scanning
- Activity goals that adjust to energy and training load
- Recovery and sleep insights from Apple Watch data
- Health journeys and habit goal tracking
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Zolt is an adaptive body coach to help you lose fat, build muscle, and maintain healthy habits. Zolt helps you reach your goal body with intelligent, personalized coaching. Whether you're cutting, bulking, or maintaining, Zolt adapts to your body every day using your own data and not just static formulas. We use an adaptive TDEE algorithm (also known as dynamic TDEE or dynamic expenditure) to help make sure you always are on track to reach your weight goals. Start with your goal. Zolt handles the rest: tracking, adapting, and coaching you toward it. Adaptive TDEE & Macros That Evolve With Your Body - Zolt’s adaptive TDEE algorithm recalculates your daily calorie needs based on real-time changes in your weight, workouts, metabolism, and recovery. No more guesswork, just adaptive calorie targets that shift as your body does. - Your macro goals also adjust based on your progress, protein preferences, and dietary focus. Everything is personalized, yet effortless. Personalized Calorie Goals for Every Phase - Zolt supports your current phase — cutting, bulking, or maintaining — and evolves with you over time. Weekly and daily check-ins help you stay consistent while your nutrition plan flexes as your weight, training, and goals shift. - Zolt doesn't just set targets, it guides you through every plateau, push, or reset. Smart Food Logging with Barcode, AI, and Recipes - Log meals with speed using AI-powered food search, barcode scanning, and custom recipe creation. Track full macros and micros, not just calories, and set flexible RDA goals based on your preferences. - Zolt turns food tracking into a seamless, personalized experience that supports your goal — not one more chore to manage. Activity Goals That Adjust to Your Energy & Training Load - No one-size-fits-all goals here. Zolt creates daily movement targets that respond to your actual recovery, energy, and recent workouts. Whether it’s a normal day, a recovery day, or a performance push, your goals adapt accordingly. - Cardio load metrics like TSB, ATL, and CTL help guide intensity over time. You train smarter, not harder. Recovery and Sleep Insights from Apple Watch Data - Zolt pulls from your Apple Watch to deliver real recovery insights — not just pretty graphs. Your sleep, HRV, resting heart rate, and SpO₂ are translated into recovery scores and readiness ratings. - You’ll get actionable tips to improve sleep quality and reduce stress, and a habit journal to help identify what’s boosting or breaking your recovery. Health Journeys and Habit Goals That Align With Your Big Picture - Zolt lets you go beyond weight to build your ideal lifestyle. Group goals into “Journeys” like longevity, performance, or energy and track habits like steps, cardio, sleep, hydration, and more. Zolt is more than a health tracker. It's a body coach that evolves with you. Smarter guidance. Clearer goals. Better results. Powered by fatsecret nutrition API (https://www.fatsecret.com) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://zolthealth.com/privacy-policy
Simple Insights
This app transforms your health and workout data into actionable coaching insights using on-device processing. It provides trend alerts, weekly reports, daily recommendations, and AI-powered answers to your health-related questions.
- AI-powered health coaching
- Trend anomaly alerts
- Weekly intelligence reports
- Daily morning briefings
- Natural language AI queries
- Apple Health integration
- On-device processing
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Train with clarity, not guesswork. Simple Insights uses Apple Health and Apple Intelligence to turn your health and workout data into clear coaching answers for recovery, training, movement, and performance — processed on device, no cloud required. Start with a 7-day free trial with full access. No account. No cloud processing. No data selling. Ever. NEW: Coach-Ready Workout Details Open any workout and read a plain sentence about it — “A hard 45-minute ride — one of your bigger workloads in the last 14 days” — before a single number. Then the figures a coach would ask for: • Training Load (TSS) and Intensity Factor, on every activity type • Zone 4+ efforts, longest effort, and dominant zone • Elapsed, active, and paused time • Heart rate drift, time to peak, average as a percentage of max • A comparison against your own recent sessions, not a population average Tap any figure for a plain-language explainer. Share the session as an image, or export the heart rate data as a spreadsheet. The last 7 days are free; subscribers get full history, sharing, and export. Ask AI (Powered by Apple Intelligence) Ask natural-language questions about your health and performance, answered from your own Apple Health trends, on device. • “How much did I train this week vs last week?” • “Show my HRV trend over the last 30 days.” • “Tell me about Morning Briefing.” • “Is my data private in Simple Insights?” Subscribers get unlimited prompts. Free mode includes 2 per day. Ask AI requires an Apple Intelligence compatible iPhone. Heart Rate Data Export Your workout data belongs to you. Export any workout’s heart rate readings to a CSV spreadsheet for Numbers, Excel, or Google Sheets — every reading in order, with elapsed time, zone, and percentage of max. Built on device, nothing uploaded. Morning Briefing Start each day with a proactive recommendation — Push, Steady, or Recover — plus a confidence score and the key drivers behind it. Tap through for how each number was calculated. Trend Anomaly Alerts Simple Insights watches your trends for you. When resting heart rate spikes, HRV drops, sleep declines, or activity falls off, you get a clear alert before you feel the impact. Workout streaks and new personal bests are flagged too. Every alert says what changed, why it matters, and what to do — then clears itself when the trend recovers. Weekly Intelligence Report A weekly report that answers one question: “Am I improving?” • Training, Recovery, Movement, and Sleep sections • Confidence-aware interpretation • Driver lines and practical next actions • Shareable PDF export for coach check-ins Built for Apple Health users Works with what you already track — Apple Watch, compatible heart rate monitors and exercise machines, and other Apple Health sources. No manual syncing. Recovery Intelligence • HRV trends • Resting heart rate patterns • High and low heart rate monitoring • Recovery behavior over time Training Intelligence • Per-session Training Load (TSS) and Intensity Factor • Heart rate zone distribution, Zone 4+ efforts, and drift • Weekly and monthly training comparisons • Workout trend summaries Movement Intelligence • Steps and movement trends • Active calorie patterns • Weekly and monthly consistency signals Intelligent Dashboards • My Dashboard and Coach Dashboard • Modular tile layouts you can reorder and personalize Privacy First by Design • On-device processing • Your data is exportable as a spreadsheet • No logins, no accounts • No ads • No cloud processing • No tracking Exports, dashboards, weekly reports, and detailed alerts are subscriber features. Free mode remains fully usable. Subscription Information Auto-renewing monthly and annual subscriptions. Pricing varies by region. Renews unless canceled in App Store settings. Privacy Policy: https://simplespinapp.com/privacy-policy Terms of Use: https://simplespinapp.com/eula If you train with intention, analyze with intention.
Screenshots
Verdict
The clearest difference is rating: Simple Insights at 4.8 against Zolt's 4.2. Simple Insights also leads on update cadence (every 2 days vs every 5 days). Zolt's advantage is ratings volume (64 vs 5) and iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and monetization model 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. Zolt sells 7 in-app purchases, starting at $4.99 per month and Simple Insights sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Simple Insights holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Zolt has 64 ratings behind it against 5, so its average is the more settled of the two.
Zolt ships an update every 5 days, Simple Insights every 2 days. The most recent releases landed on September 21, 2026 and September 16, 2026 respectively.
| Parameter | Zolt | Simple Insights |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (64 ratings) | 4.8 (5 ratings) — better |
| Positive reviews | 67.6% of reviews | — |
| Number of ratings | 64 — better | 5 |
| Update frequency | Every 5 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 186 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Zolt Labs LLC | SV Disrupt LLC |
Customer experience
Zolt
Simple Insights
In-app purchases
Zolt
- Zolt Pro - Monthly Membership7 Days trial$4.991 Month
- Zolt Pro Monthly$5.991 Month
- Zolt Pro Plus Monthly$9.991 Month
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- Zolt Pro Annual (1 year)$19.991 Year
- Zolt Pro - Annual Membership7 Days trial$34.991 Year
- Zolt Pro Annual$39.991 Year
- Zolt Pro Plus Annual$79.991 Year
Simple Insights
- Simple Insights Monthly$2.991 Month
- Simple Insights Premium Monthly$4.991 Month
- Simple Insights Annual$29.991 Year
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- Simple Insights Premium Annual$39.991 Year
Questions
Is Zolt free?
Is Simple Insights free?
Which has better reviews, Zolt or Simple Insights?
Do Zolt or Simple Insights have ads?
Which is updated more often, Zolt or Simple Insights?
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