Comparison

Happi Spells vs FLEX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 60 mini crossword puzzles
  • Over 300 words
  • Drag and drop letter tiles
  • Audio feedback
  • Earn points and snails
  • Hundreds of illustrations
Features
Read full description

** 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.

About

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.

Highlights
  • Number lines visualization
  • Fraction tools
  • Number bonds
  • Number blocks
  • Create student projects
  • Mathematical symbols
Features
Read full description

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

Happi Spells4 screens
FLEX4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Happi Spells versus FLEX: the parameters behind the verdict, then further details
ParameterHappi SpellsFLEX
Price$2.99Free — better
Rating4.9 (14 ratings) — better—
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings14 — better—
Update frequencyEvery 4 months — betterEvery 19 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS6.0 — better9.3
Further details — not scored
Size54 MB7 MB
Age rating4+4+
DeveloperHappi Papi LLCLeripa AB

Customer experience

Happi Spells

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews14 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FLEX

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

Happi Spells

No in-app purchases

None

FLEX

No in-app purchases

Questions

Is Happi Spells free?
Happi Spells costs $2.99, with no in-app purchases.
Is FLEX free?
FLEX is free to download, with no in-app purchases.
Do Happi Spells or FLEX have ads?
Neither Happi Spells nor FLEX shows ads.
Which is updated more often, Happi Spells or FLEX?
Happi Spells ships an update every 4 months, and FLEX every 19 months. Most recently, Happi Spells was updated on October 14, 2026 and FLEX on October 16, 2026.

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