Time Trap vs Sum Fall
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Time Trap
Embark on a detective adventure in a post-apocalyptic world to uncover the mystery of a missing journalist. Explore 55 realistic scenes, search for vintage hidden objects, and solve puzzles to progress through an engaging sci-fi storyline. Replay scenes for new quests and rewards.
- 55 realistic post-apocalyptic scenes
- Detective storyline
- Search for hidden items
- Solve puzzles
- Collect vintage objects
- Replay scenes for rewards
- Hint system
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Solve the mystery of the post-apocalyptic world and find out why a journalist was found missing. Perhaps it’s the work of the aliens… The game is TRULY FREE and the whole adventure is open to you without any required purchases - it's entirely up to you to buy optional tools. Features: - 55 realistic post-apocalyptic scenes - Detective storyline, Investigative journalism - 37 challenging game locations: search for hidden items and solve puzzles - Most of the hidden objects are real vintage! - Build your collection. Go through scenes again to try new quests and get new rewards! - A unique system of preview and highlighting hints Adventure will take you on a journey through empty corridors of an abandoned city in a search for the missing person. Come and rescue him from oblivion. Inspect all corners of the fantastic city: every street, every office, every corridor. Unique atmosphere and sci-fi storyline, ambient music and realistic graphics will make your trip to the quarantined zone an unforgettable experience. Each object you’ll find could be a hint. Dive into the world of fantasy! We'll be happy to stay in touch with you at www.facebook.com/CrispApp : leave comments, ask questions and get news about coming games!
Sum Fall
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Sum Fall is the arithmetic puzzle game that plays by its own rules. Place numbered pieces on the grid. Watch them fall — up or down, you never know which way. When two pieces meet and their values add up to 0 or 10, they vanish. Clear them all before the grid overflows. Simple to learn. Fiendishly hard to master. HOW IT WORKS → Each turn, choose where to place a piece in the center row → Pieces fall toward the ceiling or floor — direction is a mystery → Adjacent pieces fuse: green (+) adds, red (−) subtracts → Result is 0 or 10? Both pieces vanish and you score → Chain vanishes for multiplier bonuses: ×1.5 → ×2 → ×3 → ×5 NEW — DAILY CHALLENGE One handcrafted puzzle a day — the same for every player. Clear the board, race the clock, earn up to 3 stars. Keep your streak alive, replay past days from the calendar, and complete a full month to earn a trophy. NEW — DEMOLITION An endless series of solvable puzzle levels. Destroy every golden cell with a limited piece budget. Bombs, armored cells, mystery values, cyclic counters… plan your chains, finish under par, claim all 3 stars. THREE ENDLESS MODES EASY — No pressure. Practice at your own pace. CLASSIC — From turn 10, a new row pushes in. Stay ahead of it. HARDCORE — Both sides push simultaneously. Every move counts. POWER-UPS • Reveal Directions — see where all pieces will fall before committing • Change Direction — flip a piece's trajectory • Change Value — set any piece to the number you need (1–9) • Change Operation — switch + and − to make the math work for you • Storage — hold a piece aside and use it later FEATURES • Daily challenge with streaks, calendar and monthly trophies • Global leaderboards via Game Center • Dark mode • Second chance to keep a great run alive • Offline play — no Wi-Fi needed • Auto-save — resume any game where you left off • Lives system — regenerate over time (infinite in Premium) • No account required • English, French, Spanish, German, Portuguese PREMIUM (OPTIONAL) Remove ads, unlock infinite lives, and get an extra charge for every power-up. One purchase. No subscription. No tricks. Think you can top the leaderboard? Prove it.
Screenshots
Verdict
The clearest difference is update cadence: Sum Fall at every 8 days against Time Trap's every 7 months. On price, 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
Both are free to download. Time Trap sells 6 one-off in-app purchases and Sum Fall sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Time Trap ships an update every 7 months, Sum Fall every 8 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.
| Parameter | Time Trap | Sum Fall |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5.2K ratings) — better | — |
| Positive reviews | 87.7% of reviews | — |
| Number of ratings | 5.2K — better | — |
| Update frequency | Every 7 months | Every 8 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 190 MB | 26 MB |
| Age rating | 12+ | 4+ |
| Developer | Crisp App Studio | Adrien Buot |
Bugs and requests
Time Trap
Reported bugs
2 issues- Incorrect item names or descriptions
- Inconsistent object detection and responsiveness
Requested features
3 requests- Ability to zoom in and out of scenes
- More varied and dynamic backgrounds
- Option to disable ads for a one-time fee
Sum Fall
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Time Trap
- Instant Hint$0.99
- Preview Hints Pack$0.99
- Time Machine$0.99
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- Ads Free$0.99
- GoldMaster Special$1.99
- Master Pack: All-included$3.99
Sum Fall
- Remove Ads$3.99









