Happi Spells vs FLEX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Happi Spells
This educational game helps young children practice spelling through interactive mini crossword puzzles. It features colorful illustrations, audio feedback, and a scoring system to make learning fun and engaging.
- 60 mini crossword puzzles
- Over 300 words
- Drag and drop letter tiles
- Audio feedback
- Earn points and snails
- Hundreds of illustrations
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** Happi Spells Highlights ** - Featured by Apple in multiple categories! - Apps4Kids: This is an ingenious idea for an app. Lovely produced, surely a keeper. --------------------------------------- Has your child just figured out how to read? (If not, start by downloading Happi Reads.) Well, then it is time for the next step - spelling. Come along with Happi and try to solve challenging mini crossword puzzles. "Happi Spells" is the crossword spelling game where kids can practice spelling in a fun and exciting way by dragging letter tiles on to 60 different mini crossword puzzles. Compete for "snails" and try to improve your own high score. Don't like your score on one puzzle - just go back and try to beat it. The fewer mistakes, the more "snails" you earn. Every solved puzzle will open up a new one. Game Description: "Happi Spells" consists of 60 mini crossword puzzles in 5 different levels with 12 puzzles in each level. Puzzles are made up of 4-8 intersecting words with the relevant letter tiles spaced around the puzzle. The object of the game is to drag the tiles to their correct places in the puzzle with as few mistakes as possible. Tiles dragged to their correct place will stick. Tiles dragged to an incorrect box will "go back". Colorful images illustrate all words in the crossword puzzles. Features: * Hours of fun filled spelling practice with more than 300 words in 60 increasingly difficult crossword puzzles * Ability to change between UPPER and lower case * Audio Feedback * Hundreds of unique and vivid illustrations and backgrounds * Earn points and "snails" and try to better your high score * No ads, links or setting screens to confuse your child KNOW WHAT'S INSIDE As a MOMs with Apps member, we follow the "Know what's inside" best practices for kids’ apps.
FLEX
This interactive educational tool helps teachers visualize basic math concepts like fractions and number lines. It allows for the creation of independent student projects and supplements math training programs. Enhance understanding of mathematical skills with various visual aids.
- Number lines visualization
- Fraction tools
- Number bonds
- Number blocks
- Create student projects
- Mathematical symbols
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FLEX - Math Tools is an interactive tool for teaching basic mathematics. It contains several different tools to enhance the understanding of mathematical concepts. With FLEX - Math Tools, you as a teacher visualize new mathematical concepts with your students using for example number bonds, fractions and number lines. You can also create projects for your students that they can independently work with. The app can also be used as a supplement for students who train with Number Quest Flex. With FLEX - Math Tools you as a teachers can facilitate understanding regarding the specific mathematical skills that are trained in the program. Please visit our website for more information. FLEX - Math Tools contains the following tools: • numbers • mathematical symbols • number lines • fractions - Rectangles • number bonds • number blocks • images
Screenshots
Verdict
The clearest difference is review sentiment: Happi Spells at 100% against FLEX's 0%. Happi Spells also leads on update cadence (every 4 months vs every 19 months) and iOS requirement (6.0 vs 9.3). FLEX's advantage is price (Free vs $2.99). On ads, in-app purchases and device support 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
FLEX is free to download; Happi Spells costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Happi Spells ships an update every 4 months, FLEX every 19 months. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.
| Parameter | Happi Spells | FLEX |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.9 (14 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 14 — better | — |
| Update frequency | Every 4 months — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 9.3 |
| Further details — not scored | ||
| Size | 54 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Happi Papi LLC | Leripa AB |
Customer experience
Happi Spells
FLEX
In-app purchases
Happi Spells
No in-app purchases
FLEX
No in-app purchases









