Sight Words 1 Flashcards vs Black Hole Gravity
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sight Words 1 Flashcards
This educational game helps young children learn sight words through interactive flashcards. Featuring characters from an award-winning series, it's designed for toddlers and preschoolers to develop early reading skills.
- Interactive sight word flashcards
- Characters from award-winning DVDs
- Designed for toddlers and preschoolers
- Features 16 kindergarten sight words
- Large, tappable sight words
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Guess the sight word and flip the card to see it come to life! These adorable flashcards feature all of your favorite sight word characters from the award winning Meet the Sight Words 1 DVDs by Preschool Prep Company. Meet the Sight Words 1 Flashcards are designed to teach sight word recognition. Preschool Prep Series DVDs have won over 25 national awards and are used in preschool and kindergarten classrooms across the country. You will be amazed at what your little one can learn!™ FEATURES - Simple enough for your baby or toddler - BIG sight words for little fingers to tap - Featuring 16 kindergarten sight words BE SURE TO CHECK OUT OTHER PRESCHOOL PREP COMPANY GAMES, FLASHCARDS & iBOOKS IN THE APP STORE! As well as other Preschool Prep Company products at: www.preschoolprepco.com *There have been known compatibility issues with iOS version 7 or older, please update your device software via iTunes if you are having issues with this or any of our other apps.
Black Hole Gravity
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Black Hole Gravity is a quiet arcade about one instrument — light — and the one thing it can do here: bend around a black hole. You are the last keeper of the horizon. Drag to bend the beam: far from the hole it barely curves; close to the photon sphere it wraps around once, twice, three times before it leaves. Tap to fire a pulse along that path. Where it lands, matter moves. THREE ACTS I · THE WATCH — Worlds are sliding toward the horizon. Push them clear with light and hold the line for as long as you can. Every world you lose feeds the hole and makes it grow. II · THE NIGHT — The stars are out. Nothing to guard, nowhere to hurry. Bend the beam, watch it wind, and score by how far it turns. III · THE SOWING — The universe is cold. Push the last worlds into the singularity, shatter them into falling fragments, and grow the hole until it collapses into a new Big Bang. DEEP TIME One long run through five scales — from asteroids to whole galaxies — each around a real black hole: Cygnus X-1, Gaia BH3, Sagittarius A*, M87*, TON 618. Your enemy is Hawking evaporation. Five eras of the far future set the difficulty, and every singularity you reach births a daughter universe with slightly different laws. HONEST PHYSICS • The lensed sky and the Einstein ring are computed from the real mapping, not painted. • Winding the beam with the hole's spin draws on its rotation — superradiance (Zel'dovich 1971; Press & Teukolsky 1972). Each amplified shot slows the hole; accretion spins it back up. • Mass, Schwarzschild radius, Hawking temperature and evaporation time are shown live, computed from the hole you are playing. • Bodies that leave the screen are never teleported back: an escaping one is gone, a bound one returns on its own orbit — the edge marker tells you when. • Nothing changes under your finger. While you aim, the world waits. CONTROLS Adaptive aiming: the gear ratio next to the ship shows how fine your aim is — the closer to the capture boundary, the finer the control, so a three-winding shot is as steady as a straight one. A hardcore scheme with a log slider is there for those who want it. Two beacons, one under each thumb. A procedural soundtrack, four tracks, made from the same math. Sound designed for headphones: low pulses and singing bowls, nothing arcade. No ads. No tracking. No account. Works offline.
Screenshots
Verdict
The clearest difference is price: Black Hole Gravity at Free against Sight Words 1 Flashcards's $0.99. Sight Words 1 Flashcards's advantage is iOS requirement (8.0 vs 17.0). On update cadence, 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
Black Hole Gravity is free to download; Sight Words 1 Flashcards costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sight Words 1 Flashcards ships an update every 3 months, Black Hole Gravity every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | Sight Words 1 Flashcards | Black Hole Gravity |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 51 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Preschool Prep Company | Oleksandr Dreiman |
In-app purchases
Sight Words 1 Flashcards
No in-app purchases
Black Hole Gravity
No in-app purchases
Questions
Is Sight Words 1 Flashcards free?
Is Black Hole Gravity free?
Do Sight Words 1 Flashcards or Black Hole Gravity have ads?
Which is updated more often, Sight Words 1 Flashcards or Black Hole Gravity?
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