Best Variable Rate Apps

181+ iOS apps curated and reviewed

4.3 avg rating
18 free apps
Updated September 2026

Looking for free variable rate apps? 18 of our 181+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Variable Rate Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Ensta: Energy & Health TrackerEnsta: Energy & Health TrackerFree4.8★ (8)NoYesSep 2026
2Surveys On The GoSurveys On The GoFree4.5★ (93K)YesNoSep 2026
3UserTestingUserTestingFree2.8★ (2.5K)NoNoSep 2026
4Cash for Steps: Make MoneyCash for Steps: Make MoneyFree4.5★ (38K)YesNoSep 2026
5Heart Rate Variability LoggerHeart Rate Variability Logger$9.993.6★ (18)NoNoSep 2026
6Camera Heart Rate VariabilityCamera Heart Rate Variability$6.992.8★ (8)NoNoAug 2026
7Recharge Science: NSDR ResetRecharge Science: NSDR ResetFree4.6★ (48)YesYesAug 2026
8Heart Rate Variability & PulseHeart Rate Variability & PulseFreeYesYesAug 2026

Top Picks for Variable Rate

Ensta: Energy & Health Tracker#1

Ensta: Energy & Health Tracker by APPSPRO LTD

Sleep, Stress, HRV, Heart Rate
Editor's Choice
💪 Health & Fitness
4.8(8 ratings)
Free
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This app tracks your body's energy levels throughout the day, connecting sleep, stress, strain, and recovery into a clear picture. Observe patterns and understand how daily activities and physical metrics influence your well-being.

Surveys On The Go#2

Surveys On The Go by MFour Mobile Research, Inc

Quick cash for your opinions!
Strong Contender
🌟 Lifestyle
4.5😊(93K ratings)
FreeAds
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Earn real cash by sharing your opinions through surveys. Get paid instantly for your feedback and maximize your earnings by enabling notifications and location services. Start cashing out once you reach $10.

What We Love

  • 💰 Earns real money
  • ✅ Compensates for disqualifications
  • 🕰️ Quick surveys
  • 🔍 Relevant surveys
  • 💳 Instant PayPal payouts
  • 🔍 Location-based surveys

Room to Improve

  • 🙅‍♀️ Frequent disqualifications
  • ⏱️ Time-consuming surveys for low pay
  • 🔍 Inconsistent survey availability
  • 🔒 Privacy concerns with requested information
  • 🐛 Technical issues with surveys
UserTesting#3

UserTesting by UserTesting

Get paid to test
Worth Considering
🌟 Lifestyle
2.8😐(2.5K ratings)
Free
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Earn money online by sharing your opinions on products and services. Companies worldwide seek your unique perspective to improve their offerings. New testing opportunities are available daily, requiring only your thoughts and a device with a microphone.

What We Love

  • 💰 Good side income
  • 🤑 Decent pay for tests
  • 🤗 Fun and interesting tests
  • 🤝 Reliable payments

Room to Improve

  • 🤯 Frequent disqualifications
  • 🐛 App crashes and bugs
  • 🕰️ Long wait times for test approval
  • 🤖 Poor customer support

More Variable Rate apps to explore

FAQ about Variable Rate

What are the best variable rate apps for iPhone?
Ensta: Energy & Health Tracker tops our variable rate apps ranking as of September 2026, with a 4.8-star average from 8 App Store ratings, and it's free to download.
Yes — 18 of the top variable rate apps we rank are free to download, including Ensta: Energy & Health Tracker and Surveys On The Go.
Ensta: Energy & Health Tracker has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 181+ variable rate apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Ensta tracks sleep duration and stages, sleep consistency, heart rate, HRV, respiratory rate, and daily activity like steps. It also considers recovery and strain balance to provide a comprehensive view of your energy.
No, Ensta does not promise perfect sleep or provide medical advice. Its purpose is to help users observe their patterns and gain a better understanding of their energy levels.