Comparison

Let's Sum It vs Soundiverse

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

Head to head
About

Let's Sum It

Features
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Part of the Indoor Recess Games CFS Bundle Want to have fun practicing math problems with THREE or FOUR addends?! Practice sums to 10.... all Target Sums in this game range from 2 to 10. The goal of the puzzle is to arrange the pieces so that the sum of each horizontal row equals the Target Sum. The current sum for each row is displayed on the far right side of each row in red until it matches the Target Sum... then, it turns green. The catch is you can only slide one piece at a time to the empty square. And, only pieces adjacent to the open square can be moved. The final puzzle piece is displayed below the grid and must be dragged to its correct location as the last move. The last piece must be placed even if it is zero. Adjust the range of Target Sums or play the Challenge mode where the Target Sum is NOT displayed. The TOP 15 Quickest Times are recorded in the app (not game center) when using that mode. Want to play this on your phone? Then, check out the Sum It Climb bundle.

About

Soundiverse

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Soundiverse is a serious game filled with colourful visuals, engaging soundscapes, and playful mechanics. Children are tasked to play for approximately 12 minutes a day, five days a week, for 10 weeks. This may enhance their listening skills, slowly encouraging their brains to adapt to more difficult listening scenarios. Difficulty levels are adaptive to suit each child's unique needs.

Screenshots

Soundiverse4 screens

Verdict

The call

The clearest difference is in-app purchases: Let's Sum It at none against Soundiverse's 1. Let's Sum It also leads on iOS requirement (10.0 vs 16.3). Soundiverse's advantage is update cadence (every 4 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Soundiverse sells 1 one-off in-app purchase. Let's Sum It asks for nothing beyond the download.

UpkeepUpdate frequency

Let's Sum It ships an update every 3 months, Soundiverse every 4 weeks. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

Scorecard3 real differences ยท 3 level
Let's Sum It versus Soundiverse: the parameters behind the verdict, then further details
ParameterLet's Sum ItSoundiverse
PriceFreeFree
Update frequencyEvery 3 monthsEvery 4 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPadiPhone, iPad โ€” better
Requires iOS10.0 โ€” better16.3
Further details โ€” not scored
Size37 MB427 MB
Age rating4+4+
DeveloperClassroom Focused SoftwareSound Scouts HQ Pty Ltd

In-app purchases

None

Let's Sum It

No in-app purchases

1 purchases

Soundiverse

One-time1
  • Licence$29.99

Questions

Is Let's Sum It free?
Let's Sum It is free to download, with no in-app purchases.
Is Soundiverse free?
Soundiverse is free to download, with in-app purchases available.
Do Let's Sum It or Soundiverse have ads?
Neither Let's Sum It nor Soundiverse shows ads.
Which is updated more often, Let's Sum It or Soundiverse?
Let's Sum It ships an update every 3 months, and Soundiverse every 4 weeks. Most recently, Let's Sum It was updated on October 9, 2026 and Soundiverse on October 10, 2026.

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