Delta vs Waterline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta
This app helps users solve math problems by creating and executing algorithms. It offers tools for homework checking, test preparation, and creating custom quizzes. Users can save, share, and download algorithms via the cloud.
- Create algorithms with natural language
- Execute algorithms to solve math problems
- Create and download custom quizzes
- Save and share algorithms
- Cloud synchronization for algorithms
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With Delta: Algorithms, quickly solve any math problem with an algorithm. Save time checking your homework or studying for a test, it’s free! AVAILABLE FEATURES - Create algorithms with an easy and natural language in the editor - Quickly execute algorithms to solve any math problem - Create (or download) a quiz to train yourself - Save your algorithms on your device, share then on the Cloud, or download ready-to-use algorithms shared by other people EXAMPLE OF USAGE - Create an automated calculator for well known theorems or equations - Create a quiz to train solving equations CLOUD SUBSCRIPTION A Cloud subscription is available; It allows you to synchronize your algorithms across your devices and share them with other people on the Cloud. Application developed by Nathan Fallet © 2020 Groupe MINASTE
Waterline
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Jeu sérieux d'électrocinétique basé sur des analogies hydrauliques des composants
Screenshots
Verdict
The clearest difference is in-app purchases: Waterline at none against Delta's 3. Delta's advantage is update cadence (monthly vs every 16 months). On price, ads, device support and iOS requirement 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
Both are free to download. Delta sells 3 one-off in-app purchases. Waterline asks for nothing beyond the download.
Delta ships an update monthly, Waterline every 16 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.
| Parameter | Delta | Waterline |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (7 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Monthly — better | Every 16 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 5 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | Groupe MINASTE | Games for Citizens |
In-app purchases
Delta
- Donation 1$0.99
- Donation 2$2.99
- Donation 3$4.99
Waterline
No in-app purchases
