The time difference is the first thing people worry about with offshore mobile app development, and usually the wrong thing. A nine- or ten-hour gap is not what slows a team down. What slows it down is a question asked at 5 p.m. that nobody can answer until the next morning, repeated a few times a week.
The fix is a small set of habits: a protected overlap window, written handoffs at the end of each day, a decision log that anyone can search, and a calendar that accounts for daylight saving changes. This article walks through each, with concrete schedules for the US East Coast, the UK and Australia working with a team in India.
Get the UTC offsets right first
Most scheduling mistakes come from assuming a fixed gap. India Standard Time (IST) is UTC+5:30 and does not observe daylight saving. Your side probably does, so the gap changes twice a year.
| Location | Standard time | Daylight time | Gap to IST |
|---|---|---|---|
| US East (New York) | EST, UTC-5 (early Nov to mid Mar) | EDT, UTC-4 (mid Mar to early Nov) | IST is 10h30 ahead in winter, 9h30 in summer |
| UK (London) | GMT, UTC+0 (late Oct to late Mar) | BST, UTC+1 (late Mar to late Oct) | IST is 5h30 ahead in winter, 4h30 in summer |
| Australia (Sydney, Melbourne) | AEST, UTC+10 (early Apr to early Oct) | AEDT, UTC+11 (early Oct to early Apr) | Sydney is 4h30 ahead of IST in AEST, 5h30 in AEDT |
| Australia (Brisbane) | AEST, UTC+10 all year | No daylight saving | Brisbane is 4h30 ahead of IST all year |
Schedule examples: US East, UK and Australia with India
US East Coast + India
This is the widest gap. A common pattern is a two-hour overlap at the start of the US day. In winter (EST), 8:00 to 10:00 a.m. in New York is 6:30 to 8:30 p.m. in India. In summer (EDT), the same 8:00 to 10:00 a.m. becomes 5:30 to 7:30 p.m. IST. If the US side holds its clock fixed, the India team's evening finishes an hour earlier from March to November, which most teams welcome.
To make this sustainable, the India team typically starts later, around noon IST, so the overlap falls inside a normal working day rather than as overtime. Agree that shift explicitly when you plan the team; it affects who you can hire and how long people stay.
UK + India
The easiest pairing of the three. With the India team on 10:00 a.m. to 7:00 p.m. IST, the overlap with a 9:00 a.m. London start is 9:00 a.m. to 1:30 p.m. GMT in winter and 9:00 a.m. to 2:30 p.m. BST in summer. That is enough for a standup, a design review and live pairing on the same day.
Australia (Sydney) + India
Here Australia is ahead. With the India team starting at 9:00 a.m. IST, the overlap with a Sydney day ending at 5:30 p.m. is 2:30 to 5:30 p.m. AEDT (9:00 a.m. to noon IST) in the Australian summer. In AEST, from April to October, it widens to 1:30 to 5:30 p.m. Sydney time, which is 9:00 a.m. to 1:00 p.m. IST. Perth, on UTC+8 with no daylight saving, is only 2h30 ahead of India, so overlap is almost a full day.
Use the overlap window for decisions, not status
Two hours of overlap goes quickly. Spend it on things that genuinely need a live conversation:
- Unblocking questions raised in the previous handoff note.
- Design or UX decisions where back-and-forth would take days in writing.
- Sprint planning and backlog refinement, ideally on a fixed day each sprint.
- Release go/no-go calls before submitting builds to the stores.
Status updates, demo recordings and code review comments can all happen asynchronously. If your overlap window is full of people reading out what they did yesterday, move that to writing. A dedicated team that works only on your product makes this easier, because the same people build up context and need fewer live explanations.
Async rituals that keep work moving
Written standup
Each person posts done, next and blocked in a team channel before their day ends. Keep it to three lines.
Recorded demos
A two-minute screen recording of a new screen on a real device beats a paragraph of description.
Review SLAs
Agree that pull requests get a first review within one working day on either side, so code does not stall overnight twice.
Weekly written summary
The delivery lead sends what shipped, what slipped and what decisions are needed, every Friday.
Handoff notes and decision logs
The handoff note is the most valuable habit on a distributed team. Written at the end of the day, it lets the other side start productive work immediately instead of waiting for the overlap window.
- 1
What changed
Tickets moved, builds published, branches merged, with links.
- 2
What is blocked
Each blocker with the person who can unblock it and the exact question.
- 3
What to look at
Builds to test, designs to approve, comments needing a reply.
- 4
What we will do next
So the reader can flag a wrong direction before a day is lost.
Pair this with a decision log: a single page or database where each entry records the date, the decision, who made it, the options considered and a link to the discussion. When someone asks "why does checkout skip the address screen?" six months later, the answer is a search away rather than in a call nobody recorded.
Tooling that suits a time gap
You do not need special software, but a few setups help:
- Chat with scheduled send so messages arrive at the start of the recipient's day, not at midnight.
- Calendar showing both zones, with DST change dates added as all-day events.
- An issue tracker as the source of truth, so decisions in chat get copied into tickets.
- CI that publishes test builds automatically to TestFlight and the Play internal track, so reviewers on the other side can install the latest build without asking.
- Crash and analytics dashboards visible to both sides, which matters even more once the app is live and in ongoing maintenance.
When the gap is a real problem
Some work does suffer from a wide gap: early discovery with many open questions, production incidents in your business hours, and projects where one stakeholder makes every decision and is rarely available. In those cases, consider a larger overlap for the first few weeks, an on-call rotation that covers your peak hours, or a named product owner with authority to decide.
If you are weighing this against hiring locally, our offshore vs. onshore comparison covers the trade-offs honestly. And for a closer look at the market most of these schedules involve, see what to expect when outsourcing to India.
Frequently asked questions
How much overlap do we actually need?
For most mobile teams, two hours a day is enough if handoff notes are good. Early discovery and launch weeks may need more, so plan to widen the window temporarily rather than permanently.
Should the offshore team work our hours?
Rarely full time. Asking a team to work through the night hurts retention and quality. A partial shift, such as an India team starting around noon to overlap with the US East Coast, is a more sustainable compromise.
Does India change its clocks for daylight saving?
No. IST stays at UTC+5:30 all year, so any change in the gap comes from your side. Check the US, UK and Australian change dates each year and update recurring meetings.
Who should write the handoff note?
Each side writes its own at the end of its day. On larger teams the tech lead or delivery lead consolidates them into one short note per side.
This article is general guidance based on common delivery practice. It is not legal, tax or financial advice; platform rules and regulations change, so confirm current requirements with the relevant provider or adviser.