Comparison

DP vs Sapling Isle

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

Head to head
About

DP

Features
Read full description

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About

Sapling Isle

Features
Read full description

Sapling Isle is a multilingual interactive science lab that connects observable phenomena with advanced scientific concepts on iPhone and iPad. Change variables directly, observe how a system responds, read graphs and measurements, then explore the equations, assumptions, and limits behind the model. Explore nature and the universe • Control a 3D Solar System and observe planetary motion and astronomical time • Follow curved light, an accretion disk, and Einstein rings around a black hole Enter a hands-on physics lab • Explore forces, motion, heat, energy, magnetic fields, light, and atoms • Compare heating, compression, and diffusion in a 3D microscopic world • Investigate orbits, waves, entropy, Boltzmann distributions, quantum tunneling, and double-slit patterns Explore at your own depth • Start with direct manipulation and visual feedback • Continue with multivariable comparisons, measurements, and graphs • Go deeper into equations, approximations, and model boundaries • Choose from 10 interface languages • Adaptive layouts for both iPhone and iPad • No account, advertising, or cross-app tracking • Progress, camera frames, and experiment data are handled primarily on device Pick an island, begin with a phenomenon, and follow the evidence toward deeper models.

Screenshots

DP3 screens
Sapling Isle4 screens

Verdict

The call

The clearest difference is update cadence: Sapling Isle at fortnightly against DP's every 2 months. DP's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DP ships an update every 2 months, Sapling Isle fortnightly. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

Scorecard2 real differences Ā· 4 level
DP versus Sapling Isle: the parameters behind the verdict, then further details
ParameterDPSapling Isle
PriceFreeFree
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size26 MB40 MB
Age rating4+4+
DeveloperDavy Raitt大鹏 张

In-app purchases

None

DP

No in-app purchases

None

Sapling Isle

No in-app purchases

Questions

Is DP free?
DP is free to download, with no in-app purchases.
Is Sapling Isle free?
Sapling Isle is free to download, with no in-app purchases.
Do DP or Sapling Isle have ads?
Neither DP nor Sapling Isle shows ads.
Which is updated more often, DP or Sapling Isle?
DP ships an update every 2 months, and Sapling Isle fortnightly. Most recently, DP was updated on October 19, 2026 and Sapling Isle on October 25, 2026.

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