# RDS LDS Exam Prep 2026 vs Echo

The clearest difference is in-app purchases: Echo at none against RDS LDS Exam Prep 2026's 9. Echo also leads on update cadence (every 3 months vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RDS LDS Exam Prep 2026 sells 9 in-app purchases, starting at $14.99 per 7 days. Echo asks for nothing beyond the download.

RDS LDS Exam Prep 2026 ships an update every 10 months, Echo every 3 months. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | RDS LDS Exam Prep 2026 | Echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 months** |
| Size | 55 MB | 59 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) | [Wail Ashraf](https://appshunter.io/developer/1583763302) |

## What reviewers say

### RDS LDS Exam Prep 2026

[App page](https://appshunter.io/ios/app/rds-lds-exam-prep-2026/id6749156007)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LDS Weekly Full Access | $14.99 | per 7 days |
| LDS Monthly Full Access | $34.99 | per month |
| LDS Monthly Full Access | $34.99 | per month |
| LDS Quarterly Full Access | $59.99 | per 3 months |
| LDS Quarterly Full Access | $59.99 | per 3 months |
| LDS Semiannual Full Access | $79.99 | per 6 months |
| LDS Semiannual Full Access | $79.99 | per 6 months |
| LDS Annual Full Access | $119.99 | per year |
| LDS Annual Full Access | $119.99 | per year |


### Echo

[App page](https://appshunter.io/ios/app/echo-dent/id6753124614)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RDS LDS Exam Prep 2026 free?

RDS LDS Exam Prep 2026 is free to download, with in-app purchases available.

### Is Echo free?

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

### Do RDS LDS Exam Prep 2026 or Echo have ads?

Neither RDS LDS Exam Prep 2026 nor Echo shows ads.

### Which is updated more often, RDS LDS Exam Prep 2026 or Echo?

RDS LDS Exam Prep 2026 ships an update every 10 months, and Echo every 3 months. Most recently, RDS LDS Exam Prep 2026 was updated on September 13, 2026 and Echo on September 20, 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.*