Comparison

30 Day Ab Workout Challenge vs Flat Stomach

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

30 Day Ab Workout Challenge

Achieve a stronger core with a 30-day at-home workout plan. Follow daily exercises with video guides and voice coaching. Includes diet plans and progress tracking for comprehensive fitness.

Highlights
  • 30-day ab and core workout plans
  • Video demonstrations for 17 exercises
  • Voice coach for rep counting
  • Offline workout sessions
  • 5 diet plans with 258 recipes
  • Progress tracking (photos, weight, water, steps)
  • Apple Health integration
Features
Read full description

Thirty days. A few minutes a day. A core that feels stronger every time you sit up, stand tall or pick something up. 30 Day Ab Workout Challenge gives you one clear ab and core plan at home, for women and men. Each day shows the moves, the reps and the rest. Press start and follow along. Start free with Beginner Level 1, a full 30 day plan. HOW IT WORKS Tell the app your height and weight. It sets your starting level and reps from your BMI, using the WHO categories, and it cites its health sources (WHO, NIH and others) inside the app. There are 6 levels: Beginner 1 and 2, Intermediate 1 and 2, Advanced 1 and 2. Each level is a 30 day plan that gets a little harder each day, with rest days built in. EVERY SESSION • A warm-up to start and a cool-down to finish • 17 ab and core moves, including crunches, planks, leg raises, bicycle crunches, Russian twists, mountain climbers and side planks • A clear video for every move, saved to your phone so sessions work offline • A voice coach that names each move and counts your reps, in 10 languages • About 4 to 15 minutes, depending on your level and day All you need is a bit of floor space. EAT FOR YOUR PLAN Choose one of 5 diet plans: vegetarian, vegan, Mediterranean, Atkins or keto. Browse 258 recipes with calories and macros, swap any meal you don't like, and get a shopping list built from your meal plan. TRACK YOUR PROGRESS • Before and after photos, measurements and weight • Water and steps • Session history • 30 badges for streaks and milestones • Apple Health: reads your steps and water, and saves finished sessions as workouts • A daily workout reminder AN HONEST NOTE ON BELLY FAT No exercise burns fat from one spot, and results are different for everyone. What works is training most days and eating a little better overall. That is why the plan comes with diet plans and recipes. WHAT'S INSIDE • 6 levels, each a 30 day ab and core plan • Starting level and reps set from your height and weight • 17 ab and core moves, each with a video • A voice coach that counts your reps • Warm-up, cool-down and rest days built in • 5 diet plans, 258 recipes and a shopping list • Progress photos, measurements, weight, water and steps • 30 badges and a session history • Apple Health and a daily reminder • App in 10 languages: English, Spanish, Portuguese (Brazil), German, French, Italian, Russian, Hindi, Indonesian and Arabic BEFORE YOU START Check with your doctor before starting any new exercise program, especially if you are pregnant, injured, have back problems or are new to exercise. The app gives general fitness information, not medical advice. SUBSCRIPTION The app is free to download, and Beginner Level 1 is free. A membership unlocks every level, the diet plans, recipes, shopping list and progress tools. • Yearly: $29.99 per year, with a 7-day free trial • Weekly: $1.99 per week, no free trial The free trial is on the yearly plan only. Payment is charged to your Apple Account when you confirm the purchase, or when the free trial ends. Your subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for the renewal within the 24 hours before the period ends. You can manage or cancel it anytime in your App Store account settings (Settings > your name > Subscriptions). Any unused part of a free trial is forfeited when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.lauruss.com/app/policy.html Questions or feedback: rumbleent@hotmail.com

About

Flat Stomach

Build core strength and improve posture with guided, science-backed workouts. Train at home with no equipment needed, progressing from beginner to advanced levels. Track your activity and enjoy audio coaching to enhance your fitness journey.

Highlights
  • Guided core workouts
  • Beginner, Intermediate, Advanced plans
  • Activity tracking
  • Progressive difficulty
  • Audio coach with volume support
  • Home workouts, no equipment needed
Features
Read full description

Build muscle and shred fat. Simple guided workouts will increase your body strength resulting in improved balance, coordination and posture. Train with daily core workouts from science-backed routines. No gym, no problem! No need for any equipment, all workouts can be completed at home or on the go in just minutes. Progressively get stronger and leaner. Each plan is built to help your body adapt and improve while minimising risk of injury or burn out. Abs Trainer provides clear and easy-to-follow workouts to challenge all ability levels. Start today and take control of your body. FEATURES - Guided core workouts. Choose between Beginner, Intermediate and Advanced plans so there’s training for any level. - Track your activity to make sure you keep on growing. Workouts incrementally get more difficult so your body keeps on adapting. - Audio coach with volume support so you can play your own music in the background. - Home workouts, no gym equipment needed. Legal Disclaimer This app and any information given by it are for educational purposes only. They are not intended nor implied to be a substitute for professional medical advice. You should always consult your healthcare provider before beginning any fitness program. If you upgrade to a premium subscription, payment will be charged to your iTunes account at confirmation of purchase. Your subscription renews automatically unless cancelled at least 24 hours prior to the end of the current period. There is no increase in cost when renewing. Subscriptions can be managed and auto-renewal turned off in Account Settings in iTunes after purchase. Once purchased, the current period cannot be cancelled. Any unused portion of a free trial period is forfeited if you choose to purchase a premium subscription. Find the full terms and conditions at https://www.vigour.fitness/terms, and our privacy policy at https://www.vigour.fitness/privacy.

Screenshots

30 Day Ab Workout Challenge4 screens
Flat Stomach4 screens

Verdict

The call

The clearest difference is review sentiment: Flat Stomach at 100% against 30 Day Ab Workout Challenge's 87%. Flat Stomach also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (12.1 vs 15.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 30 Day Ab Workout Challenge sells 10 in-app purchases, starting at $0.99 per 7 days and Flat Stomach sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

30 Day Ab Workout Challenge ships an update every 2 months, Flat Stomach every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
30 Day Ab Workout Challenge versus Flat Stomach: the parameters behind the verdict, then further details
Parameter30 Day Ab Workout ChallengeFlat Stomach
PriceFreeFree
Rating4.7 (668 ratings) — better—
Positive reviews86.7% of reviews100.0% of reviews — better
Number of ratings668 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.012.1 — better
Further details — not scored
Size62 MB32 MB
Age rating4+4+
DeveloperRumbleVigour Group Ltd

Customer experience

30 Day Ab Workout Challenge

All ratings668 ratings
Positive92.1%
Neutral4.9%
Negative3.0%
Written reviews60 reviews
Positive86.7%
Neutral6.7%
Negative6.7%

Flat Stomach

Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

30 Day Ab Workout Challenge

Reported bugs

2 issues
  • Login screen freezes
  • Incompatible with older devices

Requested features

3 requests
  • Add music options during workouts
  • Improve app stability and performance
  • Adjust age rating to be more appropriate

Flat Stomach

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

30 Day Ab Workout Challenge

Subscriptions9
  • Ab challenge (Weekly)3 Days trial$0.997 Days
  • Weekly Subscription$0.997 Days
  • Abs Monthly New$1.991 Month
Show 6 more
  • Weekly Subscription$1.997 Days
  • 30 Day Ab Challenge (Weekly)3 Days trial$1.997 Days
  • Monthly Subscription$5.991 Month
  • 30 Day Ab Challenge (Monthly)3 Days trial$8.991 Month
  • Yearly Subscription7 Days trial$29.991 Year
  • Ab challenge & workout7 Days trial$37.996 Months
One-time1
  • Ab challenge & workout$39.99
3 purchases

Flat Stomach

Subscriptions3
  • Premium Weekly$0.997 Days
  • Premium Monthly$3.491 Month
  • Premium Yearly7 Days trial$22.491 Year

Questions

Is 30 Day Ab Workout Challenge free?
30 Day Ab Workout Challenge is free to download, with in-app purchases available.
Is Flat Stomach free?
Flat Stomach is free to download, with in-app purchases available.
Do 30 Day Ab Workout Challenge or Flat Stomach have ads?
Neither 30 Day Ab Workout Challenge nor Flat Stomach shows ads.
Which is updated more often, 30 Day Ab Workout Challenge or Flat Stomach?
30 Day Ab Workout Challenge ships an update every 2 months, and Flat Stomach every 3 weeks. Most recently, 30 Day Ab Workout Challenge was updated on November 6, 2026 and Flat Stomach on November 3, 2026.

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