ABC Simple Letters vs Water Rocket Fun
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ABC Simple Letters
This app helps young children develop handwriting skills by teaching them to draw letters with their fingers. It provides recognition for correct letter formation to encourage progress and is also used by teachers for children facing handwriting challenges.
- Finger tracing letter practice
- Letter recognition for encouragement
- Develops handwriting skills
- Aids children with handwriting challenges
- Supports early learning stages
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Before handwriting becomes natural our applications are designed to help your child develop their writing skills. When your child writes a letter correctly it is recognised to encourage progress. That is how each of our applications develops the ability of your child at a different stage of development allowing them to access new skills. *ABC simple letters* helps children to learn and practice drawing letters with their fingers. It is also used by some teachers in with children who find handwriting challenging.
Water Rocket Fun
Explore the physics of water rockets and optimize launch parameters for maximum altitude. This simulator uses advanced fluid mechanics and thermodynamics for accurate predictions, with a user-friendly interface for students and enthusiasts.
- Physics simulation
- Launch optimization
- Accurate apogee predictions
- User-friendly interface
- Rocket design aids
- Launcher blueprints
- Altitude calculator
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This program can help students and rocketeers understand the physics of water rockets and how to optimize their water rocket launches to obtain the highest apogees. The interface is designed to be easy to use and understand. But don't be fooled by the program's simple layout, few if any of the other simulators you may find are as accurate. Under the hood this program is pretty sophisticated and thorough. The methodology includes both incompressible and compressible fluid mechanics along with a fair amount of thermodynamics and numerical methods to provide accurate water rocket apogee predictions. Check out the excellent correlation between simulation and sophisticated high speed digital camera results shown (see graphs) and at our web site. Software Includes: * Easy input of rocket launch variables * Rapid analysis of rocket launch * Generation of performance data plots * Rocket design aids & experiments * Simple launcher design blueprints * Altitude calculator
Screenshots
Verdict
The clearest difference is review sentiment: Water Rocket Fun at 100% against ABC Simple Letters's 43%. Water Rocket Fun also leads on price (Free vs $1.99) and rating (5.0 vs 1.0). ABC Simple Letters's advantage is update cadence (every 5 months vs every 21 months) and device support (3 vs 1). On ratings volume, ads and in-app purchases 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
Water Rocket Fun is free to download; ABC Simple Letters costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Water Rocket Fun holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 43% of ABC Simple Letters's written reviews are positive against 100% of Water Rocket Fun's.
ABC Simple Letters ships an update every 5 months, Water Rocket Fun every 21 months. The most recent releases landed on September 18, 2026 and September 10, 2026 respectively.
| Parameter | ABC Simple Letters | Water Rocket Fun |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 42.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months — better | Every 21 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | CROMBEZ Emmanuel | Seeds Software |
Customer experience
ABC Simple Letters
Water Rocket Fun
In-app purchases
ABC Simple Letters
No in-app purchases
Water Rocket Fun
No in-app purchases
Questions
Is ABC Simple Letters free?
Is Water Rocket Fun free?
Which has better reviews, ABC Simple Letters or Water Rocket Fun?
Do ABC Simple Letters or Water Rocket Fun have ads?
Which is updated more often, ABC Simple Letters or Water Rocket Fun?
Other comparisons
