# SATellar vs DecoEcho

The clearest difference is update cadence: SATellar at fortnightly against DecoEcho's monthly. SATellar also leads on iOS requirement (15.1 vs 18.0). DecoEcho's advantage is ratings volume (8 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. SATellar sells 9 in-app purchases, starting at $4.99 per month and DecoEcho sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for SATellar against 5.0 for DecoEcho. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

SATellar ships an update fortnightly, DecoEcho monthly. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | SATellar | DecoEcho |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/satellar-digital-sat-prep/id6762492370/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/decoecho-flashcards-and-study/id6773129409/reviews) |
| Number of ratings | 2 | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 63 MB | 5 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [rajasekhar karawalla](https://appshunter.io/developer/1886608955) | [Lincoln Road Ventures, LLC](https://appshunter.io/developer/6773129411) |

## What reviewers say

### SATellar

[App page](https://appshunter.io/ios/app/satellar-digital-sat-prep/id6762492370)

Prepare for the Digital SAT with adaptive daily practice and simulated tests. Get a predicted score in minutes and focus on your weakest areas. Start for free with daily challenges and optional Pro upgrades for unlimited practice.

**Highlights:** Predicted SAT score in 5 minutes, Adaptive difficulty questions, Full-length SAT simulations, Thousands of real-style questions, Fix mistakes with explanations, Daily SAT challenge, Smart practice for weak topics

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SATellar — Digital SAT Prep | $4.99 | per month |
| SATellar Plus+ — 1500+ SAT | $7.99 | per month |
| SATellar Pro — 1400+ SAT Prep | $12.99 | per month |
| SATellar — Digital SAT Yearly | $35.99 | per year |
| SATellar Plus+ Yearly 1500+ | $59.99 | per year |
| SATellar Pro — Yearly 1400+ | $95.99 | per year |
| SAT Practice — 2 Sessions | $1.99 | one-time |
| SAT Practice — 10 Sessions | $7.99 | one-time |
| SAT Practice — 20 Sessions | $12.99 | one-time |


### DecoEcho

[App page](https://appshunter.io/ios/app/decoecho-flashcards-and-study/id6773129409)

This app uses a smart spaced-repetition engine to optimize your study sessions. It adapts to your learning pace, showing you cards you struggle with more often and those you know well less frequently. Focus on learning with its intuitive design and privacy-focused approach.

**Highlights:** Spaced-repetition study engine, Dating-app style swipe grading, Type-the-answer study mode, Two-sided cards with text and images, Daily and lifetime study statistics, iCloud sync, Deck sharing with classmates

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DecoEcho Pro | $4.99 | one-time |


## Frequently asked questions

### Is SATellar free?

SATellar is free to download, with in-app purchases available.

### Is DecoEcho free?

DecoEcho is free to download, with in-app purchases available.

### Which has better reviews, SATellar or DecoEcho?

SATellar and DecoEcho are both rated 5.0 out of 5 on the App Store, from 2 and 8 ratings respectively.

### Do SATellar or DecoEcho have ads?

Neither SATellar nor DecoEcho shows ads.

### Which is updated more often, SATellar or DecoEcho?

SATellar ships an update fortnightly, and DecoEcho monthly. Most recently, SATellar was updated on October 6, 2026 and DecoEcho on October 9, 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.*