# FlexEnergy vs Sunkalpa App

The clearest difference is update cadence: FlexEnergy at monthly against Sunkalpa App's every 3 months. On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FlexEnergy ships an update monthly, Sunkalpa App every 3 months. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FlexEnergy | Sunkalpa App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sunkalpa-app/id6757699053/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | Free |
| Size | 51 MB | 61 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fitbase](https://appshunter.io/developer/1530906929) | [Marina Kuznecova](https://appshunter.io/developer/1868348915) |

## What reviewers say

### FlexEnergy

[App page](https://appshunter.io/ios/app/flexenergy/id6744245615)

This app allows fitness club and sports studio clients to view schedules, book classes, and manage their memberships. Clients can receive workout reminders, check membership validity, and view their visit and payment history.

**Highlights:** View workout schedules, Book group and individual classes, Receive workout reminders, Check membership validity, Pay for classes online, Cancel or reschedule bookings, View visit and payment history

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sunkalpa App

[App page](https://appshunter.io/ios/app/sunkalpa-app/id6757699053)

Access a self-service system for booking practices and stay updated on center news. Discover unique offers and special pricing through this application.

**Highlights:** Self-service practice booking, Center news updates, Exclusive offers, Special pricing access, User-friendly interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FlexEnergy free?

FlexEnergy is free to download, with no in-app purchases.

### Is Sunkalpa App free?

Sunkalpa App is free to download, with no in-app purchases.

### Do FlexEnergy or Sunkalpa App have ads?

Neither FlexEnergy nor Sunkalpa App shows ads.

### Which is updated more often, FlexEnergy or Sunkalpa App?

FlexEnergy ships an update monthly, and Sunkalpa App every 3 months. Most recently, FlexEnergy was updated on October 25, 2026 and Sunkalpa App on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*